Specifications

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The 7-speed dual clutch transmission enables
rapid gear shifting with hardly any perceptible
break in propulsive power and is therefore
particularly efficient.
As long ago as 1985, Walter Röhrl tested this tech-
nology in the Sport quattro S1 – and was suitably
impressed. Audi drivers share his enthusiasm to
this day, because the modern S tronic changes gear
in a flash. To do this, two multi-plate clutches
serve the different gears. One large clutch trans-
fers the torque via a solid drive shaft to the gear-
wheels of the odd-numbered gears. A second
clutch serves the even-numbered gears via a hol-
low shaft. Both parts of the gearbox are perma-
nently active, but only one of them is actually con-
nected to the engine via the closed clutch. For
example, when the driver accelerates in third gear,
the second part of the transmission is already set
in fourth gear. The gear is changed by switching
the clutches – the first clutch opens while the sec-
ond one closes very quickly. The gear change
takes only a few hundredths of a second and takes
place with practically no break in propulsive power.
It happens so quickly and fluently that the driver
hardly notices.
It does not matter whether the driver chooses the
fully automatic modes with the programme D
(Drive) or S (Sport) or changes gear manually
with the optional shift paddles – the gear change
feels precise and extremely smooth. Even with
all of this dynamic technology, the S tronic still
remains very efficient. Due to its high efficiency,
there is a reduction in both fuel consumption
and emissions.
What is the benefit of two clutches?
A double saving: time and energy.
S tronic
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The latest quattro® with crown gear differential and
torque distributed
selectively to each wheel combines
mechanics and electric in an intelligent manner. Up
to 85% of the drive torque can be
distributed to the
rear axle and up to 70% to the front axle. This ensures
unrivalled traction and excellent driving dynamics.
S tronic: Two multi-plate clutches
ensure sporty dynamics and a high
level of efficiency.
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