The 2011 Ford Mustang comes in 10 different models, to suit everyone's exact needs. Four contain the 3.7L V6 engine, while the other 6 contain the 5.0L V8 engine. The 2011 Ford Mustang models that come with the 3.7L V6 engine are the following: V6, V6 Premium, V6 Convertible, and the V6 Premium Convertible. All of these models have highway mile per gallon rates between 30 and 31 miles. The six 2011 Ford Mustang models that contain the famous V8 engine are the following: GT, GT Premium, GT Convertible, GT Premium Convertible, Shelby GT500, and the Shelby GT500 Convertible. However, the Shelby GT500 and the Shelby GT500 Convertible come with engines of 5.4L supercharged 4-V V8 engine. The least expenisve model is the V6, starting at $22,145, while the most expensive model is the Shelby GT500 with a starting price of 53,645.