The 2013 Cadillac ATS is available as a 4-door, 5-seat sedan. Starting at $33,095, the 2013 Cadillac ATS 2.5L RWD is powered by a 2.5L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 33-mpg on the highway. The top of the line 2013 Cadillac ATS 3.6L Premium AWD, priced at $47,795, is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 26-mpg on the highway.