Engine and Driveline
At its series launch the Audi A8 long version will be available with a 246 kW (335 hp) 4.2-liter V8 five-valve engine and permanent quattro all-wheel drive. The standard 6-speed tiptronic invites the driver to choose freely between the sporting character of a manual-shift gearbox and the convenience of automatic transmission.
The engine has gained significantly in terms of output and performance- plus 25 hp and plus 20 Nm torque: values that guarantee supreme drive-off performance and vivid acceleration in all speed ranges.
The A8L 4.2 quattro sprints from 0 - 100 km/h in only 6.4 seconds and has a top speed of 250 km/h (governed).
An absolute first at Audi: the new 6-speed tiptronic with Dynamic Shift Program (DSP) and an additional Sport program. Thanks to the additional ratio, power output and torque are always available in such accurately controlled amounts that there are no further conflicts between spontaneous power flow, high performance on the road and perfect refinement.
Those who prefer their gears to be selected automatically will appreciate the outstanding convenience of the adaptive electronics. A version of the Dynamic Shift Program (DSP) specially developed for the 6-speed tiptronic helps to reduce the number of gear shifts, despite the additional ratio compared with the previous five-speed unit.
In addition, manual gear-shifting is possible when the selector lever is moved to the tiptronic gate plane. Another innovation in the Audi A8 is the option of changing gear by actuating the shift paddles behind the steering wheel. The driver can for instance change gear when cornering, and without having to take his or her hands off the steering wheel.
The quattro permanent all-wheel drive, through which the A8L 4.2 transfers its power to the road, remains an advanced feature in the luxury car class. It ensures excellent traction and stable cornering, and minimizes any self-steering tendency caused by the influence of tractive force through the driveline. This is a precondition for high cornering speeds and a high level of dynamic stability. Or to put it another way: maximum driving pleasure and active safety.
The new A8 has aluminum suspension with a four-link front axle layout and a controlled toe-angle trapezoidal-link rear axle - both concepts that gave already the A8's predecessor its typical responsiveness and steering precision. Audi's suspension engineers have now purposefully further developed its strengths. The braking system and the steering system with variable transmission ratio and servotronic were newly designed.
The adaptive air suspension - 4-corner air springs and continuous shock absorber control - is an air suspension concept used for the first time in the luxury car class, which eliminates the classic conflicting target of satisfactory handling properties and the appropriately high level of suspension comfort. Lowering the ride height at high speeds improves the new Audi A8's aerodynamic properties and therefore reduces its fuel consumption.
Air suspension with the electronically controlled, continuously adaptive shock absorber system provides perfect driving comfort. The system responds to numerous sensor signals: body acceleration, vertical movement of the four wheels and also various other parameters such as steering angle or the position of accelerator and brake pedals, before determining the optimum damping force for the relevant driving situation.
As long as there is no necessity for increased damping - for example travel in a straight line on a good-quality road - the shock absorbers remain comfortably soft. Controlled changes to the damping force at individual wheels help to eliminate body movements at any time which could reduce occupant comfort.
Not only comfort but driving dynamics too benefit from this concept. The new Audi A8's adaptive damping automatically reduces rolling or pitching movements when cornering, braking or driving off.
The A8L 4.2 quattro is fitted with sporty, elegant 10-hole, 8 J x 17" alloy wheels fitted with 235/55 R17 tires as standard equipment. This combination ensures excellent handling and ride comfort and sets high standards in terms of good wet-road grip and low rolling resistance.