The 2015 Audi A4 is available as a 4-door, 5-seat sedan. Starting at $35,500, the 2015 Audi A4 FrontTrak FrontTrak Sedan w/o Sunroof is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 32-mpg on the highway. The top of the line 2015 Audi A4 quattro Sedan, priced at $37,600, is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 31-mpg on the highway.