The 2011 Mustang is a 2-door, 4-passenger family coupe, sports coupe, convertible, or convertible sports car available in 8 trims, ranging from the V6 Coupe to the GT Premium Convertible. The V6 Coupe is equipped with a standard 3.7-liter, V6, 305-horsepower engine that achieves 18-mpg in the city and 29-mpg on the highway. The GT Premium Convertible is equipped with a standard 5.0-liter, V8, 412-horsepower engine that achieves 16-mpg in the city and 24-mpg on the highway. A 6-speed manual transmission with overdrive is standard on both trims, and a 6-speed automatic transmission with overdrive is optional.