Although the RS5 uses the same direct-injection 4.2-liter V-8 found in the S5 Coupe, the folks at Quattro GmbH have transformed the engine into a verifiable screamer. The high-revving V-8 is good for 450 hp @ 8250 rpm, and throws down as much as 317 lb.-ft. of torque between 4000 and 6000 rpm. (For comparison, the S5’s engine is rated at 350 hp @ 7000 rpm and 325 lb.-ft. of torque at 3500 rpm).
Audi’s Quattro all-wheel-drive system is, of course, standard equipment, but a revised center differential allows an increasingly variable torque split — although it’s set to send 60 percent of the power to the rear wheels, as much as 85 percent can be channeled through the rear differential. Also standard is a seven-speed dual-clutch transmission. For the time being, no manual variant is expected.
Source: Automobile Magazine