Audi's state-of-the-art 4.2-liter FSI direct injection V8 is stuffed under the S5's hood, whipping up 354 horsepower and 325 lb.-ft. of torque peaking at a low 3,500 rpm. A six-speed short-throw manual gearbox delivers the power to all four wheels in a 40/60 front/rear split, the quattro AWD able to transfer the bulk of power to the wheel or axle with the most grip at a moment's notice. Acceleration to 60 mph takes about five seconds, and bringing the S5 to a halt is easy thanks to bigger brakes with black painted calipers. The stability control system offers two-stage deactivation, and Audi also installs a sport-tuned suspension designed for better handling at the limit.