The 2014 Cadillac ATS is a 4-door, 5-seat Sedan, available in 16 trims, ranging from the 2.5L RWD to the 3.6L Premium AWD. Upon introduction, the $33,065 2.5L RWD is equipped with a standard 2.5L, 4-cylinder, engine that achieves 22-mpg in the city and 33-mpg on the highway. An Automatic transmission is standard. The $48,195 3.6L Premium AWD is equipped with a standard 3.6L, 6-cylinder, engine that achieves 18-mpg in the city and 26-mpg on the highway. An Automatic transmission is standard.