The 2009 Audi TTS is available as a 2-door, 4-seat coupe. Starting at $45,500, the 2009 Audi TTS quattro Coupe is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 29-mpg on the highway. The top of the line 2009 Audi TTS quattro Roadster, priced at $47,500, is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 29-mpg on the highway.