2007 Audi Cross Cabriolet quattro Concept

The two-door, four-seater car measures 4.62 metres in length and combines the genes of a typical dynamic soft-top convertible from Audi with the all-round qualities of a fully fledged SUV. The muscular, powerful, but also elegant lines make no secret of this vehicle's potential. The 240 bhp three-litre TDI engine with ultra-low emission technology delivers sporty driving dynamics with exhaust emissions on the level of the EU 6 limits. The quattro permanent four-wheel-drive system and high-tech chassis with electric ride height adjustment are a recipe for driving pleasure on all terrain and in any curve radius.

The Audi Cross Cabriolet quattro offers a new dimension in open-top driving among the SUV field: its fabric hood lowers itself to disappear completely behind the rear seats in a spectacularly brief 17 seconds; no B-pillar and no roll-over bar obscure the view of the heavens. And for convertible fans, it offers a new dimension in spaciousness: as an SUV, the Cross Cabriolet quattro provides its occupants with copious headroom, legroom and shoulder width in addition to an off-roader's typical height and comfortable sitting position. So when cruising along the beachfront, for instance, all four occupants can enjoy the open-air experience to the full.

Design and body
Spectacular - a term which sums up the visual impact of the Audi Cross Cabriolet quattro painted in "Copper Sunset", whether the top is up or down. After all, without the hint of a compromise, the concept car combines classic Audi convertible hallmarks, such as the elegant fabric hood and aluminium A-pillar surface, with the undisguised dynamism of a sports car and the masculine presence of a genuine SUV.

4.62 m long, 1.91 m wide and with a wheelbase of 2.81 m: the Audi Cross Cabriolet quattro has the dimensions of a B-segment vehicle. The longitudinally mounted engine and the basic chassis and drivetrain architectures are taken from the inventory of modules used in the current Audi A4 and Audi A5 model lines. The SUV-style height of 1.63 m with the hood closed marks the most significant difference to these relatives of the Cross Cabriolet quattro.

High passive safety

Body stiffness and passive safety measure up to the typical standards of an Audi convertible. This is achieved with reinforcements to the A-pillar, the rear seat cross member and the sill area, in addition to a simple trick that exploits the extra body height of an SUV. The Cross Cabriolet quattro has a double underbody that turns the open profile of a convertible body into a closed structure, producing a major increase in stiffness. This design feature is efficient and economical in equal measure, since it replaces conventional modifications that involve numerous body components and require significantly more material, thus adding more weight.

The A-pillar and the top edge of the relatively shallow windscreen have been heavily reinforced to aid roll-over protection. Two roll-over bars, normally lowered out of view, are located behind the rear seats and are preloaded by powerful springs. If the vehicle is in danger of rolling over, the sensor system releases the spring retaining mechanism, causing the bars to shoot up within milliseconds to provide effective protection together with the A-pillars for the occupants in the interior.
The dominant element of the face-on view is the single-frame radiator grille with polished aluminium longitudinal struts, emphasising its vertical orientation - a clear signal of the concept car's sporty character. Behind its clear-glass headlight covers, the latest lighting technology can be seen: the Cross Cabriolet quattro is the latest Audi to be equipped with full LED headlights, which also feature the characteristic strip of daytime running lights and the electronically controlled swivelling cornering light. The turn signals, brake lights and tail lights also use fast-reacting LED light units. In addition to the front and rear light units, the exterior mirrors also have integrated turn signals.
In the side view, a distinct aspect of current Audi design can be seen in the shoulder line and dynamic line, which divide the vehicle body volume into a clearly defined sporty architecture. An equally characteristic feature is the proportion between the large body surface and shallow window area beneath the soft top's sweeping roof line - the hallmark of a sports car.
Within the pronounced styling of the wheel arches, the large 21-inch wheels with tyres of size 265/35 R21 send out a clear visual message and make an additional contribution to both driving pleasure and safety.
The fabric hood, which lowers itself fully automatically in a Z-fold behind the rear seats at the push of a button, is a trademark of all open-top Audi models. It is a stylistic feature that makes the car recognisable as a convertible, even with the hood up, and requires considerably less space in the rear and adds less weight than a complex folding steel roof.
In terms of noise and heat insulation, the Audi A4 Cabriolet's multi-layer fabric hood has long been found to compare very favourably with a solid roof in everyday use.
The underbody guard and metal running boards are classic off-roader features. They have been given a modern interpretation on the Audi Cross Cabriolet quattro. The running boards are integrated into the sills with a seamless transition to the door opening. The underbody guard covers the whole width of the vehicle. The LED front fog lights are integrated into the front section and the rear section accommodates the two exhaust tailpipes on the left and right.
Two generously sized doors provide access to the interior in typical convertible style. Thanks to the lack of a B-pillar and the easy entry front seats, rear passengers have no trouble getting in and out.
The rear loading solution is a perfect synthesis of convertible design and SUV functionality. When closed, the short stepped boot lid forms a continuation of the fabric hood's coupé line. When it opens, however, with the assistance of its gas springs, it lifts up high to provide a surprisingly large opening. At the same time, the glass rear window, which is hinged to the fabric hood, automatically lifts up too. The result is an opening to the luggage compartment that matches that of a conventional SUV equipped with an off-roader's traditional large tailgate. The loading width is 1.16 m and the load-area width is 1.05 m.

The Audi Cross Cabriolet quattro thus gives its driver the best of both worlds - the freedom and elegance of a convertible blended with the spaciousness and versatility of an SUV.

Interior
The interior of the Audi Cross Cabriolet quattro offers sophistication and ergonomically perfect solutions in all areas and with all its materials. The smooth and soft surfaces together with a gentle, natural blend of colours help to provide an atmosphere of absolute ease for the occupants. For additional convenience, each passenger has a heatable and coolable cup holder, located in the centre console at the front and in the side walls at the rear.
The driver and passengers enjoy the comfort of four spacious individual seats. The seating is entirely upholstered in "White Stone" leather. All occupants benefit from lateral support and excellent long-distance comfort. To enhance comfort when driving with the top down, all four seats are equipped with an airscarf function. Air vents on the head restraints serve to compensate for the air turbulence around the occupant's neck.
The space available in the second row is unique for the convertible world: the legroom, shoulder space and headroom are unbeatable, even with the roof closed.

The centre console continues far into the rear of the interior and provides the rear passengers with a stowage box with lifting lid.

A regular Audi characteristic of the cockpit area in the Cross Cabriolet quattro concept car is the way it is markedly angled towards the driver. The controls can be found here, while the front-passenger area is emphatically neat and architecturally clear-cut. In turn, the dashboard and doors are connected by flowing lines, while the cockpit itself is smoothly and organically integrated. In addition to the instrument dials under the dome-shaped cowl behind the steering wheel and a central LCD colour display integrated between them, the MMI also supplies information via its swivelling flat screen, well positioned within the driver's field of vision in the upper section of the centre console.

The MMI terminal on the centre console is also extremely neat. The central operating button and the six hard keys are the simplest way imaginable to operate the vehicle and infotainment functions.

In addition to the MMI terminal, the Cross Cabriolet quattro also has a touchsensitive sensor field (touch pad) in front of the MMI control element. Like on a laptop, this can be used, for example, to move image sections of the map display. The system is also capable of recognising and processing commands entered by tracing letters with your finger on the touch pad.

Infotainment
Google Earth, the interactive, three-dimensional atlas of the world, has gained a firm role on all personal computers. Now this software is making life easier on the road too. Audi has, for the first time ever, brought together the merits of the internet-based system Google Earth and its own built-in navigation system to create countless information facilities with user-friendly graphics.
The high-resolution display and photorealistic 3D maps provide a new dimension in intuitively understandable bird's eye visualisations that are rich in detail. The image angle and section can of course be adjusted to suit the driver's wishes at any time. By connecting to the internet, it will also be possible in future for traffic and weather information or even data on air quality to be included and taken into account in planning your route.
Using Google Earth's search function, the driver can also find addresses or service providers at the chosen destination and navigate directly to them - for instance restaurants, car parks or an Audi dealer.

To enter a navigation destination, there is no longer any need to enter the address by hand. The driver can click on an image in the Google Earth user interface and be directed to the identified destination.

Drivetrain
Power is supplied by the latest stage of evolution of the three-litre diesel with common rail direct injection. It develops 176 kW (240 bhp) and has an impressive maximum torque of 500 Nm. It is this ultra-powerful TDI with a displacement of 2,967 cc that truly makes the Cross Cabriolet quattro a sports car. It accelerates from 0 to 100 km/h in just 7.2 seconds and has a top speed of 240 km/h - yet the average fuel consumption is a mere 7.3 l/100 km. The 500 Nm provide a mighty surge of acceleration starting from just above idling speed.
The 3.0 TDI is coupled to the quattro permanent four-wheel drive and an eightspeed automatic transmission. If the driver wishes to change gear manually, the shift paddles at the steering wheel can be used. The especially designed selector lever with integrated control wheel for gear selection is a newly developed variation of the shift-by-wire system.

The latest 3.0 TDI is notable not only for its low fuel consumption, but also for its especially clean exhaust. A diesel particulate filter is used to reduce soot emissions: it cuts the already low level of untreated emissions further, by more than 90 percent.

The cleanest diesel in the world
The new 3.0 TDI with ultra-low emission system is a further step forward that demonstrates the potential of the Audi TDI. Drivers are thrilled not only by the dynamism of 176 kW (240 bhp) and the outstanding torque of 500 Nm, but also by its modest fuel consumption and extremely low emissions.

The ultra-low emission system raises the principle of the direct-injection turbocharged diesel to a new level. To develop it, Audi's engineers combined a whole package of innovative measures. A new common rail system with piezo injectors operating at a pressure of 2,000 bar, high-efficiency exhaust gas recirculation and further optimised turbocharging join forces to achieve a significant reduction in untreated emissions.

A further technical breakthrough is the actual exhaust aftertreatment system, which cuts emissions of oxides of nitrogen (NOx) by as much as 90 percent. This system operates with the additive AdBlue, an aqueous solution of carbamide, small amounts of which are injected ahead of the DeNOx catalytic converter. In the hot exhaust gas, the solution breaks down into ammonia, which splits the oxides of nitrogen into nitrogen and water.
The AdBlue solution, which is biodegradable, is topped up as a routine operation each time the car is serviced, without the customer having to take any action. Since consumption of the solution is very low, Audi can guarantee that the amount carried on the car will be sufficient from one service to the next. The system will remain effective for the entire service life of the vehicle.

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2007 Audi Cross Coupe quattro Concept

At the Shanghai Motor Show Audi will present a study that defines a new segment in the field of crossover vehicles. The Audi Cross Coupé quattro combines the design and dynamism of a compact premium sports car with the spaciousness and versatility of a four-seat sport utility vehicle (SUV). Innovative technical solutions show new ways of achieving efficiency, driving pleasure and comfort in a manner that is typical of Audi. The Audi Cross Coupé quattro: a car whose visual appearance clearly tells you what it is capable of and whose engineering matches this standard - on all roads, under all conditions.

The silhouette is typical Audi; the design of the study, painted in Liquid Silver, is highly reminiscent of the sporty models produced by the Ingolstadt brand. The proportions and the large 20" wheels point clearly towards the offroad potential of the Cross Coupé quattro. A new element is the fabric folding roof, which, when it is open, gives optimum levels of headroom and fresh air. The hood is opened and closed electrically.

The transversely installed four-cylinder inline TDI engine with common-rail fuel injection and piezo injectors is a completely new development. With power output of 204 bhp and 400 Nm of torque, it gives the vehicle a sporty performance and a surprising degree of efficiency. On average the ultra-modern 2.0 TDI needs just 5.9 litres of diesel per 100 km. The diesel particulate filter and Bluetec system reduce soot and nitric oxide emissions effectively. Even today, the Audi Cross Coupé quattro satisfies the emissions standards of the future.

The quattro permanent four-wheel drive system is a matter of course on an Audi with offroad potential. A Haldex clutch ensures that traction is precisely distributed according to the situation. The sporty Audi S tronic dual-clutch gearbox executes gearshifts in a matter of milliseconds.

The running gear, featuring a McPherson-strut front axle and a four-link rear axle is perfect for sporty and agile handling that retains a high degree of stability and makes cornering distinctly fun. As an additional quality, the driving comfort of the running gear impresses on all types of road and in rough terrain, meeting even the standards expected of a vehicle in a higher class. Ceramic brake discs promise excellent, non-fading deceleration. 20" wheels give the Cross Coupé quattro the ground clearance required.

Numerous electronic systems support the driver. The Audi drive select system makes it possible to preselect three highly individual configurations for the engine, gearbox, steering and adaptive shock absorbers. The result: a car that can be enjoyed in three completely different ways.

Besides the standard "dynamic" drive select mode and the "sport" setting, the Audi Cross Coupé also has the "efficiency" driving program. Here, the engine map and the shift points are modified to support a particularly economical driving style. In addition, the system deactivates components that are particularly energyhungry, for example the air-conditioning compressor.

Another innovation is the MMI control panel, which is operated by a touch pad. The monitor of the system employs, for the first time, dual-view technology. The system can produce different images for the driver and front-seat passenger. These images are only visible when viewed from a specific angle. This allows the driver to read data from the on-board computer while the front passenger watches a TV programme, listening to the sound through headphones.

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2007 Audi Q7 V12 TDI Concept

A year ago, Audi added yet another new chapter to the ongoing diesel success story on race tracks around the world. Developing over 650 bhp, the V12 TDI fitted in the R10 TDI sports prototype left its petrol-powered rivals trailing in all of the races it participated in, including the most challenging of them all, the classic Le Mans 24 Hours. The R10 TDI also triumphed in the LMP1 category of the American Le Mans Series with an impressive string of victories.

The V12 TDI - the new flagship V engine
When working on the road-going version of the V12 TDI, which will be built in its Györ plant in Hungary, Audi drew on all of the know-how that underpins the racing engine. The range-topping diesel is the new flagship model in the Audi range of V engines, spanning petrol and diesel units with 6, 8 and 10 cylinders.
The V12 TDI's cylinders actually sweep a greater volume than the racing engine, which has a capacity of 5.5 litres. Its 5,934 cc are produced by a bore of 83.0 millimetres and a stroke of 91.4 mm, the same dimensions as the six-cylinder 3.0 TDI. The two banks of cylinders are positioned opposite one another with an offset of 17 millimetres. Measuring just 684 mm long, the V12 diesel has an extremely compact design. Indeed, its compact size was one of the key prerequisites for integrating the V12 into the Audi Q7.

The V12 TDI features the same 90 mm spacing between cylinders as the other models in the V engine series. However, the cylinder banks are placed at an angle of 60 degrees to one another instead of the customary 90 degrees. This particular V12 configuration suppresses all of the inertial forces and mass moments which would otherwise cause vibrations. Consequently, the engine's smoothness is flawless in every regard.

Lightweight construction: crankcase made from vermicular graphite
The V12 TDI's crankcase is made from a mixture of cast iron and vermicular graphite - Audi already uses this high-tech material, known as GJV-450, in the manufacture of the V6 TDI and V8 TDI. GJV-450, which is produced using a patented casting method, is around 40 percent more rigid than cast iron and twice as resistant to fatigue.
This enabled the development team to make the walls thinner, paving the way for a potential weight-saving of around 15 percent compared to conventional cast iron.
The crankshaft is forged from chrome-molybdenum alloy steel and is mounted with the aid of an extremely rigid main bearing bridge made from nodular cast iron. The forged connecting rods are cracked, and the pistons are made from aluminium.

The two cylinder heads each comprise three main elements. The bottom section, incorporating the intake and exhaust ports and through which the coolant flows, is made from a low-pressure die-cast aluminium alloy that has a high-strength, lightweight construction. The top section, which conducts the oil, is pressure-cast. The cylinder head is crowned by a reinforcing ladder-type frame which holds the two camshafts.

Perfect air ducting: flaps in the intake ducts
The valves are actuated by four camshafts acting via low-friction roller-type cam followers, the compression ratio is 16.0:1. The map-controlled swirl variation of the combustion air deployed in the V6 and V8 TDI models has been retained. With this system, one of the intake ports for each cylinder is either opened or closed by means of an electrically operated flap, depending on the engine's operating point. Intermediate flap positions are also possible. This allows the swirl to be adjusted for optimum exhaust emissions combined with high power delivery.

As is customary on V engines from Audi, the maintenance-free chain drive is fitted in a space-saving location on the rear face of the engine. The developers devised a new layout for the V12 TDI, however. The crankshaft's sprocket wheel meshes with an intermediate gear which in turn drives the camshafts by means of two simplex chains. Two additional chains drive the oil pump as well as both high-pressure pumps for the common-rail injection system.

2,000 bars of pressure: ground-breaking common-rail technology
The injection technology featured in the V12 TDI is every bit as revolutionary. The high-pressure pumps both form part of the common-rail system supplied by system specialist Bosch. The twin plunger pumps are capable of building up pressures as high as 2,000 bar in the rails, considerably more than the previous usual maximum of, at most, 1,600 bar.

The piezoelectric injectors with their eight-hole nozzles have also undergone a thorough reworking. The tiniest quantities of diesel fuel are injected into the combustion chambers through their eight-hole nozzles, whose diameter has now been reduced to a mere 0.12 millimetres. The high pressure produces an optimum spray pattern inside the combustion chamber, which makes for a faster, more homogeneous and, as a result, more acoustically refined ignition process. What's more, the improved combustion efficiency increases power output whilst reducing both fuel consumption and pollutant emissions.

Ultra-fast and ultra-precise: the piezoelectric injectors
The latest generation of inline injectors employs the piezo effect: piezo crystals expand slightly when an electrical voltage is applied to them. Over 300 piezo discs are packed into each of the V12 TDI injectors, which transmit the minimal expansion to the valve needle directly (inline) without the need for any form of transmission mechanism between the two. Each actuation takes just a few milliseconds - by comparison, a wink of the eye lasts 100 ms.
The fuel pressure and quantity can be adjusted according to requirements; the number of injection phases per power stroke can be varied up to a maximum of five with the piezoelectric technology in the V12 TDI. Main injection can be accompanied by both pilot and post-injection phases. Pilot injection lessens the harshness of the combustion sound, which is particularly noticeable at low engine loads. The delayed post-injection of fuel serves to increase the temperature of the exhaust gas - this allows any particulate residue to be burned off in order to regenerate the two particulate filters which are included as standard.
Supercharging: a turbocharger for each bank of cylinders

Attached to the outside of the engine's V are the two turbochargers which each supply compressed air to one bank of cylinders. Their variable vane geometry ensures that the full exhaust flow is directed through the turbine at all times - the turbochargers offer fast response even at low rev speeds and attain a high degree of efficiency.

Both turbochargers generate up to 2.6 bar of absolute boost pressure and therefore have a vital role to play in achieving the formidable peak torque of 1,000 Nm which the new V12 TDI constantly has on tap between 1,750 rpm and 3,000 rpm. The diesel's 368 kW/500 bhp equates to a specific output of 62.0 kW/84.3 bhp per litre.
Cooling effect: two intercoolers to reduce the temperature of the air

The temperature of the compressed air is reduced by two large intercoolers. The V12 comes with a double-flow exhaust system featuring two particulate filters. The intake system is similarly structured - for each bank of cylinders there is an air cleaner followed immediately by a hot-film air mass meter. Two control units operating based on the master-slave principle orchestrate proceedings inside the engine.
The Audi Q7 V12 TDI already complies with the Euro 5 emissions standard, which is due to come into force in mid-2010 and will make especially tough demands in terms of reducing nitrogen oxides. It was with this in mind that the Audi engineers devoted particular attention not only to the new common-rail system and its high-precision fuel metering, but also to the exhaust gas recirculation system.
At partial throttle, up to 50 percent of the exhaust gases are fed back into the intake air in order to reduce NOx emissions. The extensive recirculation system incorporates a water cooler which reduces the temperature of the exhaust gases sharply.
The awesome V12 TDI directs its power as standard to a fast-action, smooth-shifting new six-speed tiptronic transmission. From here, the forces flow to a quattro driveline, which splits the drive power 40:60 between the front and rear wheels under normal driving conditions. This results in slightly tail-heavy, sporty handling characteristics, exceptional agility and exemplary steering precision.
To ensure that its phenomenal performance can be safely harnessed, the Audi Q7 V12 TDI is equipped with powerful, ventilated disc brakes. The ESP dynamic handling control system features a hill descent assist as well as a special off-road mode. The safety specification is rounded off by the pairs of front, side and head airbags in the interior.
An elaborate double-wishbone independent suspension has been used for each of the four wheels, while the majority of the axle components are made from aluminium. The adaptive air suspension, incorporating an electronically controlled damper system, comes as standard, creating a perfect synthesis of sporty handling on the one hand and silky ride comfort on the other. The body's ride height can be adjusted from its starting position of 180 mm above the ground up to the lift mode offering a whole 240 mm of ground clearance. The Audi Q7 V12 TDI study rides on 20-inch cast aluminium wheels.
Design: the best of both worlds
The Audi Q7 V12 TDI is just as fascinating to look at as it is to drive. The principal feature which distinguishes it from its lesser-powered siblings is the contrasting paintwork of the underfloor panels at the front and rear. The striking, almost vertical single-frame radiator grille has a chromed finish and echoes the dynamic Audi S6 and Audi S8 models, which both head their respective ranges powered by V10 FSI engines. Flanking the grille are wide headlight units with visible light tubes.
The Audi Q7 styling has a thrilling air of elegance blended with dynamism, and displays both tremendous sportiness and the robustness of an accomplished off-road vehicle. The Audi Q7 cuts a powerful, elongated figure, boasting the sportiest proportions in its segment, with a length of 5,086 millimetres, a width of 1,983 mm and a height of 1,737 mm.
The high side panelling gives the vehicle's body a muscular feel, particularly in the way it contrasts with the flat, sporty styling of the window area. The dynamic line above the wheel arches, the powerfully contoured shoulder section and the flowing roof line combine with the standard-fit roof rails to emphasise the car's athletic looks. The distinctive tapering at the front end and the tail with its steeply angled D-pillars form the end markers of a distinctly coupé-like silhouette.

The Audi Q7 offers outstanding levels of spaciousness courtesy of a wheelbase measuring 3,002 mm. The three rows of seating accommodate up to seven people. The seats in the second row can be specified with fore-and-aft adjustment as an option and offer occupants a class-beating footwell length. Both of the rear rows of seats can be folded down flat, increasing load capacity to a maximum of 2,035 litres. The 5-seater version of the Audi Q7 offers 775 litres of load space in its luggage compartment, while the 6-seater version features individual second-row seats. The tailgate of the Audi Q7 V12 TDI opens and closes electrically at the push of a button.

Amply sized interior plus innovative operating concept
The interior and cockpit area of the Audi Q7 create the impression of a light and airy expanse, flawless ergonomics and top quality. The standard-specification deluxe automatic air conditioning regulates heating and ventilation separately for the driver's and passenger's side, taking sunlight levels into account in the process. The Audi Q7 also comes equipped as standard with the MMI operating system which has already earned high praise in the A8 and A6 and can be expanded to include numerous additional functions.
A number of state-of-the-art driver assistance systems may be specified as an option. These include the radar-assisted "Audi side assist" for lane-changing manoeuvres, the "Audi parking system advanced" featuring both visual and acoustic guidance as well as a rearview camera, plus the latest-generation automatic proximity control system, Audi cruise control with braking guard, which is capable of braking the vehicle to a standstill if required.
The seats are upholstered in leather, and the front seats are heated. Carbon panels give added emphasis to the interior's sporting flair. And to ensure that drivers can enjoy supreme operating convenience there is a cruise control system, a driver information system and a multifunction steering wheel.

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2007 Audi Q7 V12 TDI

The new Audi Q7 V12 TDI is powered by a twelve-cylinder diesel engine containing a wealth of pioneering technology. With an outstanding 500 PS and 1,000 Nm of torque, the six-litre engine of the high-performance SUV provides the driving performance of a sports car.

Sprinting from 0 to 100 km/h in just 5.5 seconds and achieving an electronically governed top speed of 250 km/h, the Audi Q7 V12 TDI is catapulted into the echelons of top-class sports cars. New horizons have been set in the diesel market thanks to this outstanding power. None of our competitors can offer a comparable engine.

Exceptional comfort

The new six-speed tiptronic gearbox, which features extensive reinforcements, shifts quickly and comfortably. It transfers the enormous power to the quattro permanent four-wheel drive system. The new Audi Q7 V12 TDI has an average fuel consumption of just 11.9 litres per 100 kilometres.

All diesel engines from Audi are highly dynamic thanks to their high performance and high torque characteristics. Audi has often proved its sporty character in series production, most recently through the six and eight-cylinder 3.0 TDI and 4.2 TDI engines. Audi also rewrote the record books earlier this year on the racetrack. Following its debut in Sebring, Florida, the premium R10 prototype sports car won every long-distance race it entered.

The V12 race engine in the R10 squeezed 650 bhp from its 5.5-litre engine capacity, reaching a top speed of 330 km/h. The power and endurance of the R10 was an immediate hit with fans and experts alike. However, what completely surprised them was the sound of the engine: unlike most racing engines, the powerful Audi diesel engine runs whisper-quiet.

Transferring race car technology into series production is an Audi tradition. The FSI engine in the predecessor to the R10, the R8, notched up five victories in Le Mans with its petrol direct injection. Audi has already transferred FSI performance to the production line. The most recent examples of this are the high-revving V8 in the RS 4 and the V10 FSI in the S6 and S8.

Pioneering technical performance

The new series-production V12 TDI, assembled in our plant in Györ, Hungary, reaches a still outstanding level of "only" 500 bhp. When designing the engine, it was kept in mind that the six-litre engine would be a derivative of the current family of Audi V-engines, which up to now were limited to six, eight and ten cylinders. The basic findings from the race car were of course transferred to the series-production engine. The V12 TDI aggregate has a cylinder clearance of

90 mm, which is standard for engines of this type. Nonetheless, the engine has a cylinder angle of 60° instead of 90°, leading to an elimination of inertia in this type of V12 design. Driving comfort is thus ensured in every situation.

The total engine capacity of 5,934 cm3 is derived from a bore measurement of 83 mm and a stroke of 91.4 mm, exactly the same as that of the 3.0 TDI. The large diesel engine is extremely compact. Measuring 684 mm in length, it is only 166 mm longer than the V8 TDI. These dimensions are the primary requirement for integrating the V12 into the Audi Q7.

The crankcase of the V12 TDI is constructed from cast-iron with vermicular graphite. This high-tech material, known as GJV-450, has already been used in the V6 and V8 models.
Produced in a patented casting procedure, GJV-450 is around 40 % more rigid and 100 % more fatigue-resistant than grey cast iron. This allowed the developers to reduce the wall thickness. The weight potential compared to conventional grey cast iron is around 15 %.
The crankshaft, forged from a chrome and molybdenum steel alloy, is held by an extremely rigid main bearing bracket made from cast iron reinforced by nodular graphite. The forged piston rods are cracked, whilst the forged pistons are made from aluminium.
Both cylinder heads are composed of three main elements. The lower section is made from a highly durable and light aluminium alloy where the intake and escape channels are integrated. The upper section guides the flow of engine oil, whilst both camshafts are stored within a reinforcing ladder frame.

The valves are actuated using low-friction roller cam followers with a compression ratio of 16:1. The engine characteristic swirl variations of combustion air were taken from the V6 and V8 TDI engines. The optimum swirl with respect to emissions and simultaneous high performance can therefore be set.

Ultra-modern injection technology
Like most Audi V-engines, the maintenance-free chain drive is located on the back of the engine in a space-saving arrangement. A new layout is used in the new V12 TDI. The chain wheel of the crankshaft locks into the gearwheel. From here two simplex chains drive the camshaft. Two further chains drive the oil pump and both high-pressure pumps in the common rail injection system.
Both new double stamped high-pressure pumps are part of the new common rail injection system developed by the specialists at Bosch. Both pumps amass up to 2,000 bar of pressure in the rails; only 1,600 bar was usually achieved up to now.
The piezo injectors, with their eight-hole jets, have also been radically updated.An optimal spray is created in the combustion chamber through the high pressure. This in turn allows the ignition process to take place quicker and more homogenously, leading to a much better sound. The efficient combustion also improves performance whilst reducing emissions and fuel consumption.

The current generation of inline injectors use the piezo effect. When an electric current is created, piezo crystals expand in milliseconds. This expansion is then directly transported (inline) by the V12 TDI injectors - containing over one hundred piezo plates - to the injection nozzle needles without the use of mechanisms in between.

The number of injection processes per power stroke can be widely varied using piezo technology, in the case of the V12 TDI up to five injections.
In addition to the main injection, pre and post-injections are possible. Pre-injections reduce the acoustic hardness of the combustion procedure. Post-injections serve to increase the temperature of the emissions, helping regeneration of both standard-fit particulate filters.
Both turbochargers can be found on the exterior of the V-engine, each supplied with a cylinder bank. Thanks to its adjustable guide vane geometry, the complete gas emission stream is always fed through the turbines. The chargers respond even at low levels of revolution and reach high levels of efficiency.
Both turbochargers amass a charge pressure of up to 2.6 bar and are a key aspect of the exceptional torque levels of 1,000 Nm that are supplied to the V12 TDI constantly between 1,750 and 3,000 rpm. With its 368 kW (500 bhp), the diesel reaches a specific performance of 62 kW (84.3 bhp) per litre of engine capacity.

Two large charge air coolers reduce the temperature of the compressed air. The V12 comes with a double-flow exhaust system with two particulate filters. The suction unit is built in a similar way - each cylinder bank contains an air filter behind which an air mass meter is stored. Two control units manage what happens within the engine according to the master-slave concept.

The Audi Q7 V12 TDI will conform to the Euro 5 emissions class which will come into force in 2010 and demand a reduction of nitrogen oxide emissions. Aside from the precise analysis of the fuel injection system through the common rail system, the Audi engineers have focused especially on exhaust gas recirculation. At partial load, up to 50 % of emissions are recirculated through the air intake in order to reduce nitrogen oxide emissions. The large-dimension recirculation system is stored in the upper section of the V cylinder and includes a water cooler which reduces emission temperature significantly.

The design
The Audi Q7 V12 TDI is impressive not only with regard to technology but also in terms of appearance. The most striking visual changes to the Audi Q7 are the underbody panels at the front and rear. The chrome-plated single-frame radiator grille evokes the tradition of the Audi S6 and S8. These two cars, with their

V10 FSI engines, are the top sports models in their class. The V12 TDI features a powerful braking system which is every bit its equal.

Vorsprung durch Technik - Diesel milestones from Audi

A further milestone in diesel technology has been reached with the advent of the new V12 TDI. The Ingolstadt brand has been the pioneer in the diesel domain for over three decades. In 1978, Audi introduced the Audi 100, the world's first five-cylinder diesel. The first TDI engine in motoring history was introduced in the successor model in 1989. The 2.5-litre five-cylinder engine offered 88 kW (120 bhp) and 261 Nm of torque, and catapulted diesel motoring into whole new dimensions.

In 1994, an expanded version was produced with 103 kW (140 bhp). The engine was also available with the option of four-wheel drive - the first TDI quattro. At the same time, a new four-cylinder diesel engine was introduced in the Audi 100 and Audi 80, the now legendary 1.9 TDI with 66 kW (90 bhp).
Towards the end of 1995, the four-cylinder achieved new heights of 85 kW (115 bhp) through the use of pump-jet injection. Just over a year later at the beginning of 1997, the world's first 2.5 V6 TDI made its debut. This engine came with four valves per cylinder and reached 110 kW (150 bhp). With a top speed of 220 km/h the Audi A8 became the quickest series-production diesel on the market. The first eight-cylinder TDI followed in 1999, a V8 with a displacement of 3.3 litres. The 3.0 TDI was introduced in the spring of 2004, the first V6 diesel engine with inline piezo injectors in the common rail system.

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2007 Audi R8

With power and elegance

The wide, full shape of the R8 seems to hug the road. It demonstrates its potential through its imposing proportions, accentuated wheel arches and substantial air apertures. It is like no other Audi before it - with the unmistakable proportions of a mid-engine car. These proportions are dictated by the forward position of the cabin and the clearly separate engine compartment behind it. A characteristic feature of the side view of the R8 is the "sideblade", which visually accentuates the engine's position as well as acting as an air deflector.

And yet the R8 is undeniably first and foremost an Audi, not just because of the characteristic single-frame grille at its front end. For the first time, the four rings are positioned not over the grille, but on the lid above it. The sparing but always very precise use of lines is another typical Audi characteristic, as is the curved arc of the roof. And the continuous line running from the front apron across the wheel arches and flanks to the tail end, then back down the other side, is significant for the brand. This "loop" naturally encompasses the air apertures, the headlights and the rear lights.

Unmistakable face by day and night

The passion expressed through the elaborate design of the lights is another typical Audi trait. The R8 already acquires an unmistakable frontal aspect through the standard bi-xenon headlights and daytime running lights comprising twelve light-emitting diodes - day and night alike. Nor is anyone likely to overlook this Audi sports car from behind: for the very first time, LED tail lights with a three-dimensional effect have successfully been used.

But the absolute highlight will be the all-LED headlights, available for the Audi R8 as an option from the end of 2007, and making their first ever appearance worldwide on a production car. With their lenses and reflectors, these innovative light sources not only look progressive; they also have an enormous functional advantage: with its colour temperature of 6,000 Kelvin, LED light resembles daylight much more closely than xenon or even halogen light. Drivers will consequently suffer much less fatigue when driving at night.

The interior offers a luxurious standard of motor racing atmosphere. Its design is as sporty and exclusively as the exterior: the characteristic element here is the monoposto - an expansive arc running around the steering wheel and instruments, connecting the driver to the car. The interior consequently picks up on the dynamism of the R8 and gives it tactile expression in a form that is accessible the moment you climb in.

Exceptionally spacious

For a sports car, the exceptional everyday suitability of the R8 is highlighted by the large amount of space, due in no small measure to the generous wheelbase of 2.65 metres. Whatever the build of the driver and passenger, they will always be able to find their perfect seated position. The view is also very good for a mid-engine vehicle. Narrow A-posts optimise the field of view to the front and sides.

The luggage compartment is an important aspect of everyday suitability: 100 litres fit beneath the front lid, and there is room for bags with a total volume of a further 90 litres behind the seats. And even passionate golfers need not forgo their sport when driving the R8: two full-size golf bags can be stowed behind the seats.

The impression of quality in the interior is striking: even in the basic specification, the surfaces of the driving area and door trims are meticulously trimmed, with neatly finished decorative seams. And the scope for customisation is as diverse as the preferences of the R8's future owners could conceivably be: piano finish, carbon fibre and a wide variety of leathers are just some of the options.

Light but highly rigid body
The body of a sports car needs to be particularly light and rigid: low weight permits superior road performance, and rigidity is the crucial starting point for an agile driving feel allied to high precision. The Audi Space Frame body, made from aluminium, provides the ideal basis for this. Audi has more expertise than any other manufacturer worldwide in the designing and production of cars based on aluminium technology, and has channelled its accumulated know-how into the R8.

The entire bodyshell of the R8 weighs just 210 kilograms, the pinnacle of achievement among sports cars in terms of lightweight design quality. It comprises extruded sections, aluminium panels and highly complex cast nodes, joined together by 99 metres of weld seams, 782 punch rivets and 382 self-tapping screws.

Superlative precision in the production shop
This structure is created largely by hand at the R8 production shop in Neckarsulm, but with precision measuring and machining methods keeping a watchful eye over the whole business: a laser measuring system checks 220 points on each body to within one-tenth of a millimetre, and a special computer tomograph can investigate the absolute quality of every join with micron precision. A central processing plant cuts and drills all 52 connecting points on the running gear and steering in a single pass. This assures maximum precision in the axle geometry.

The aerodynamics experts at Audi have done their work so thoroughly on the R8 that, as an added benefit of its elegant shape, the body actually produces a downforce - unlike many other sports cars. This promotes directional stability at high speeds. It is achieved by means of the extending rear spoiler, but above all thanks to the fully clad diffuser underbody.

Enormous propulsive power across wide speed range

The heart of the sports car is of course the engine. As well as being exceptionally compact, the eight-cylinder power unit of the R8 runs lustily and effortlessly up to very high engine speeds, peaking at 8,250 rpm. The reward is 420 bhp and an even buildup of torque that produces enormous propulsion across a wide range of engine speeds. The engine's dry sump lubrication, typical of a race engine, permits a particularly low installed location and assures a constant oil supply in even the toughest of driving conditions - for instance on a racetrack. And the FSI direct injection underpins the very good full-load performance with a highly efficient combustion process.

The road performance is correspondingly impressive: the R8 dashes from 0 to 100 km/h in just 4.6 seconds, whether with manual gearbox or with R tronic sequential gearshifting. The needle hits 200 km/h after only 14.9 seconds, and the engine's propulsion is only finally held in check by rolling resistance and drag at 301 km/h.

However, the captivating character of the V8 stems not just from its effortless propulsion, but equally from its ample, versatile sound characteristics. Thanks to ingenious fine-tuning measures, Audi's engineers isolated disagreeable frequencies and then orchestrated an impressive opus from the intake and exhaust sound.

Lightning start thanks to Launch Control
The R8's transmission comes with six well-spaced ratios that can be operated either manually, in conjunction with the clutch, or automatically via the R tronic. The R tronic is an entirely new development that operates faster than even the most adept of drivers and offers racing-style thrills with the shift paddles on the steering wheel. The R tronic accomplishes lightning-fast starts worthy of the racetrack thanks to Launch Control.

The quattro permanent four-wheel drive provides that decisive extra dose of traction and driving safety. The system was adapted to the mid-engine concept, with its ideal axle load distribution of 44:56 percent, and directs between 10 and 35 percent of the engine's power to the front wheels as necessary.

Precision suspension provides safety boost
The precision suspension of the Audi R8 remains supremely in control of the sporty performance, but is equally capable of assuring relaxed driving pleasure over long distances. The sports car obeys steering movements with spontaneous agility, always demonstrating exceptionally good driving safety. The suspension, with double wishbones at both the front and rear, is optimised for a neutral self-steering response and maximum ease of control.

A particularly innovative damping technology is available for the R8 as an option: Audi magnetic ride adapts the suspension characteristic to the profile of the road and the driver's style within milliseconds. A generously-dimensioned brake system supplies the necessary braking force. It applies a total of 24 pistons to the four studded brake discs. This braking performance can only be topped by the optional ceramic discs. They are even capable of withstanding the rigours of racing-style use.

Exclusive standard equipment
The Audi R8 combines its superior performance with both a surprising measure of everyday suitability and an exclusive equipment specification. It comes ready-equipped for example with a 140 watt audio system, an alarm system, deluxe automatic air conditioning and the driver information system with integral stopwatch for taking lap times. The sports seats are trimmed in combined Alcantara/Leather and the 18-inch wheels are fitted on cast alloy wheels.

The list of optional extras nevertheless includes a couple more highlights: for example, the wide range of customisation options, the Audi parking system advanced with integral rearview camera, and the superb Bang & Olufsen sound system. Surround sound from twelve high-end speakers with a 465 watt music output delivers an exceptional music experience.

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