Official Word:

Today, Audi of America announces the fastest and most powerful RS 6 and RS 7 models to date - the RS 6 Avant performance and RS 7 performance. The new models receive a number of dynamic improvements including an increase in power and torque, more precise self-locking differential, and more direct steering. Sound insulation inside the car has also been reduced allowing the song of the powerful 4.0-liter biturbo V8 to be heard more clearly, offering...Read.