The B7 platform S4 is the most recent version of
the vehicle, having debuted in late 2005. Although
Audi classifies it as a new car, the differences
between it and the outgoing B6 S4 are primarily
cosmetic.
Audi
has, however, made a few notable changes, including
adding new springs and dampers to the suspension
and re-calibrating the quattro system to maintain
a 40:60 front-to-rear torque split under normal
conditions. The system is continuously adjustable
though, and the torque split can change depending
on driving conditions. The new "fish mouth"
grill, narrow headlamps, "L" tail-lamps
and quad exhaust tips help distinquish the B7
from the previous B6 model.
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