2008 Audi S6

The Audi S6 is a high-performance version of the A6 sedan. It delivers a whopping 435 horsepower at 6800 rpm via a Lamborghini-sourced 5.2-liter V10 engine. A solid 398 pound-feet of torque is achieved between 3000 and 4000 rpm.

Like Audi's other "S" models, the S6 features sportier suspension, larger wheels with performance tires, and a more aggressive bodykit. A row of LED running lights under the main headlights also differentiate the S6 from the A6.

The S6 sprints from 0 to 60 mph in 5.1 seconds; its top speed is electronically governed at 155 mph. A six-speed Tiptronic automatic and Quattro all-wheel-drive come standard.

The V10's throaty rumble at idle isn't all show -- over 90 percent of the torque is available from as low as 2,300 rpm. For all its aggressiveness, Audi promises the engine delivers very low-vibration and
plenty of refinement.

The transmission, steering, chassis and brakes of the S6 have been modified to reflect the engine's power. The firmer settings of the springs, dampers and elastokinematics as well as a more direct steering ratio make the S6 feel less like an executive sedan and more like a sports car.

A self-locking center differential, installed longitudinally in the driveline, distributes power between the front and rear wheels, according to the driving situation. The normal split is 40 percent to the front wheels and 60 percent to the rear

The Audi S6 comes standard with 19-inch cast aluminum wheels. The standard tire spec is 265/35 R19, providing plenty of grip for spirited driving. The S6 has four large disc brakes measuring 15.2 inches in diameter up front and 13 inches at the rear.