Audi S4 is a high performance sport version of the popular Audi A4. The S4 name was originally used for the sport version of the Audi 100. The S4 was sold worldwide with a turbocharged version of Audi's 2.2 L (2226 cc), 20-valve inline-5 engine developing 230 PS (227 hp/169 kW) and 350 N·m (258 ft·lbf) of torque.

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