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| Audi S6 Avant Rear Body |
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| Audi S6 Avant Front |
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| Audi S6 Avant Speed |
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| Audi S6 Avant Design |
The Audi S6 and S6 Avant use the 309 kW (420 hp) version of the new 4.0 TFSI. The twin-turbo V8 provides a constant 550 Nm (405.66 lb-ft) of torque from 1,400 to 5,300 rpm. It accelerates the S6 from 0 to 100 km/h (62.14 mph) in 4.8 seconds and the S6 Avant in 4.9 seconds. With both models, the electronically governed top speed of 250 km/h (155.34 mph) 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 Audi S6 and 9.8 liters (24.0 US mpg) in the Audi S6 Avant, well below that of the competition.
