Specifications

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Hard at work under the bonnet of the Audi S6 is
a V8 4.0 TFSI engine featuring the innovative
new Audi cylinder-on-demand technology. This
keeps just four of the eight cylinders operating
at partial throttle – without you noticing any
difference. The engine continues to run smoothly
and powerfully, but its fuel consumption and
CO₂ emissions are reduced accordingly. This
method of operation is what we call “intelligent
performance”. Audi cylinder on demand selec-
tively closes certain cylinders only, two in each
cylinder bank to be precise. As a result, engine
operation is impressively smooth at partial loads
too. Cylinder shut-off is controlled by several
factors: the engine speed must be between
930 and 3,500 rpm, for instance, the engine
temperature must be at least 40 °C, and you
must be driving in at least third gear. If the full
power of all eight cylinders is not required, the
Audi valvelift system will close the intake and
exhaust valves as well as shutting off injection
and ignition for the relevant cylinders. In other
words, no air is drawn in, fuel injected or exhaust
gases discharged. Or, put another way: there is
a substantial improvement in the fuel consump-
tion and emissions figures. The V8 4.0 TFSI en-
gine is additionally equipped with a start-stop
system as well as energy recovery, and meets
EU5 emissions limits, of course. The unit em-
ploys the Audi valvelift system, which generates
higher torque while cutting fuel consumption.
The quattro® permanent all-wheel drive system
with sports differential helps to fulfil the power-
plant’s dynamic performance potential. Thanks
to its remarkably spontaneous response and
exceptional power delivery across the entire rev
range, the V8 engine also enables the car to
be driven in an effortlessly sporty manner. Its
309 kW output and 550 Nm of peak torque
catapult the S6 Saloon from 0 to 100 km/h in
4.8 seconds, and the S6 Avant in 4.9 seconds.
The engine is electronically governed to a top
speed of 250 km/h.
The fuel consumption and CO₂ emission figures can be found on page 54.
Power output
Torque
Power output, kW
Torque, Nm
Engine speed in rpm
Engine performance curve V8 4.0 TFSI
360
300
240
180
120
60
0
780
650
520
390
260
130
10000 2000 3000 4000 5000 6000 7000
0
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