The Audi S5 is simply the high-performance version of the Audi A5. Also, the Audi S5 features the coupé, five-door fastback, and cabriolet versions of the fourth-generation Audi S4 saloon and estate models. The S5 has a front-engine, four-wheel-drive layout and has been on the market since 2007 with its first-generation model, the S5 B8/8T. The other two generations included the S5 B8.5/8.5T and the S5 B9.