A performance variant of the Audi A6, the 2013 Audi S6 is powered by a 4.0-liter twin-turbocharged V8 engine that produces 420 hp and 406 lb-ft of torque. Performance is impressive with a top speed of 155 mph and a 0-60 time of 4.5 seconds. Audi cylinder on demand™ technology allows for improved fuel efficiency, an EPA estimated 17 mpg city and 27 mpg highway. Standard Quattro AWD is paired with a 7-speed dual clutch S tronic transmission. Features include lightweight aluminum frame, five-link front suspension, adaptive sport suspension, cornering LED lights, 20-inch wheels, sport steering wheel with shift paddles, sunroof, sport stitched leather seats, embossed S6 symbols, heated front/rear seats, 22-way power seat, BOSE® sound system, navigation system, and a rear-view camera. Safety is comprised of advanced airbags, anti-lock braking system, electronic stability control, traction control, and tire pressure monitoring system. The S6 is backed by a 4-year/50,000-mile warranty.