The Audi RS7 Sportback is one of the most dramatic-looking big fastbacks ever made, and what powers it is equally special. Hiding under the RS7’s long hood is a 4-liter twin-turbo V8 engine, found in some Porsche, Bentley, and Lamborghini models. Its ample torque and power turn the RS7 into a straight-line monster with supercar-rivaling acceleration and an impressive top speed. The first version of this engine debuted in 2012 when it was made available in the S6, S7
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