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Drivetrain

The S6 and S6 Avant use the 420 hp (309 kW) version of the new 4.0 TFSI. The twin-turbo V8 provides a constant 406 lb-ft (550 Nm) of torque from 1,400 to 5,300 rpm. It accelerates the S6 from 0 to 60 mph in 4.6 seconds and the S6 Avant in 4.7 seconds. With both models, the electronically governed top speed of 155 mph (250 km/h) is just a formality.

The 4.0 TFSI brings Audi's downsizing strategy to the high-performance class. Compared to the engine in the previous model, the free-breathing, 5.2-liter V10, it offers even sportier performance while reducing fuel consumption by as much as 25 percent. Average fuel consumption is just 9.7 liters per 100 km (24.25 US mpg) in the S6 and 9.8 liters (24.0 US mpg) in the S6 Avant.

A number of technologies contribute to this top result, including the recuperation and start-stop systems as well as the new "cylinder on demand" cylinder management system. When the V8 deactivates four cylinders under part load, the Active Noise Cancellation system (ANC) is activated. Four microphones integrated into the headlining record the noise in the cabin, which is then analyzed by a computer. If the computer detects intrusive sound elements, it broadcasts an antiphase sound through the speakers of the sound system. This sound combines with the intrusive sound and largely cancels it out.

Independent of this, active, electronically controlled engine bearings use targeted counterpulses to attenuate low-frequency vibrations. A sound actuator, flaps in the exhaust system, the engine shroud and a newly developed two-mass flywheel with a centrifugal force pendulum in the seven-speed S tronic also contribute to the sonorous sound and smoothness of the engine.

When it comes to power transmission, the S6 and S6 Avant further extend Audi's Vorsprung durch Technik. The engine power flows through a fast-shifting, seven-speed S tronic transmission. The quattro permanent all-wheel drive system uses the self-locking center differential and torque vectoring. If desired, Audi complements quattro with the optional sport differential, which actively distributes the power between the rear wheels.

Suspension, Brakes and Chassis

The two new S models come standard with the adaptive air suspension sport. The tautly tuned air suspension with variable damping lowers the body by 10 millimeters (0.39 in). It provides for highly precise handling without compromising comfort. The powerful disc brakes, internally ventilated front and rear, have matt black calipers with S6 logos. Audi offers carbon fiber-ceramic discs as an option.

The S6 and S6 Avant come standard with cast aluminum wheels in a unique five parallel-spoke design. The 8.5 J x 19 wheels are shod with 255/40-series tires. Seven different 19- or 20-inch wheels, four of them from quattro GmbH, are available as options. The 20-inch titanium-look wheels with a five-arm rotor design impart a particularly exclusive appearance.

The Audi drive select driving dynamics system comes standard in the two new S models. Among others, it modifies the characteristic of the gas pedal, the shift points of the S tronic, the servo boost of the electromechanical steering and the characteristic of the adaptive air suspension. The driver can adjust the operation of these systems in five stages. The optional sport differential and the dynamic steering, which varies its ratio as a function of speed, can also be integrated into the system.

Equipment

The new Audi S6 and S6 Avant will be rolling into dealer showrooms with a generous list of standard equipment in spring 2012. This includes xenon plus headlights with an all-weather light, LED rear lights, an electromechanical parking brake and the driver information system with color display. The MMI radio plus includes a Bluetooth interface, and the Audi sound system has ten speakers.

All of the high-end options in the model series are also available for the new S models. These include LED headlights, adaptive light, the ambient lighting package, convenience key, head-up display, the parking system plus with 360° camera, power rear hatch, optionally with sensor control, and climate-controlled deluxe seats with massage function.

The list of options for the Avant, which offers up to 59 cu ft (1,680 liters) of luggage space, also includes the panoramic glass roof.

The tightly networked driver assistance systems are all state-of-the-art. These are the various versions of the Audi pre sense safety system, adaptive cruise control with stop & go function, Audi side assist, active lane assist, the speed limit display and the night vision assistant with highlighting of detected pedestrians.

Topping the range of infotainment systems is MMI navigation plus, which features a large hard drive, an eight-inch monitor and the groundbreaking MMI touch input system. The system can be combined with the Bluetooth online car phone, which brings special Internet services to the car and features WLAN connectivity for mobile devices. The 15-speaker Bang & Olufsen Advanced Sound System impresses with its excellent sound.

Audi S6: Photo Gallery, Review (1/2) and Specifications