The 2017 Ford Mustang is a 2-door, 4-seat Coupe, available in 8 trims, ranging from the V6 Fastback to the GT Premium Convertible. Upon introduction, the $24,645 V6 Fastback is equipped with a standard 3.7L, 6-cylinder, engine that achieves 17-mpg in the city and 28-mpg on the highway. a Manual transmission is standard. The $42,145 GT Premium Convertible is equipped with a standard 5.0L, 8-cylinder, engine that achieves 15-mpg in the city and 25-mpg on the highway. a Manual transmission is standard.