A performance variant of the Audi A7, the 2013 Audi S7 is powered by a 4.0-liter twin-turbocharged engine that produces 420 hp and 406 lb-ft of torque, for a sub 5 second 0-60 time. The 7-speed S-tronic transmission is mated to Audi Quattro AWD. Features include sunroof, LED daytime running lights, tri-zone climate control, heated steering wheel, keyless start, Bluetooth® hands-free phone capabilities, adaptive cruise control, power drivers seat, heated rear seats, and power-folding exterior mirrors. Safety is comprised of traction control, electronic stability control, brake assist, anti-lock braking, advanced airbags, and blind spot monitoring. The A7 is backed by a 4-year/50,000-mile warranty.