Besides forming the core of the TT RS Roadster and the Audi TT RS Coupé, the 2.5-liter 5-cylinder also breathes life into the Audi RS 3 Sedan and the RS 3 Sportback. With this engine, the TT RS Roadster goes from zero to 62mph in 3.9 seconds while the Coupe version achieves this in two seconds less. The latter RS 3 Sedan and RS 3 Sportback ciPfNy.