Other than the different body styles, the Audi RS6 Avant and RS7 Sportback are virtually identical. The super wagon and liftback weigh about the same and share the twin-turbo 4.0-liter V8 with a monstrous 600 horsepower and 800 Newton-meters (590 pound-feet) of torque. The same goes for the Quattro AWD system and the eight-speed automatic transmission with launch control. Ok, then why bother lining up the two Audi Sport models for a drag race?
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