The 2003 Ford Mustang GT is powered by a 4.6L, 16 valve V8 engine that puts out 260 horsepower and 302 foot-pounds of torque. Average gas mileage for this car lies between 16 to 29 miles per gallon.
Along with the GT model, the 2003 Ford Mustang line offered the base model, Mach 1 and Cobra variants. The base Mustang had a 3.8L V6 engine making 193 horsepower, the Mach 1 version made 305 horsepower via a 4.6L, 32 valve V8, and the Cobra relied on a 4.6L, 32 valve V8 engine outputting 390 horsepower. In 2003, Ford reintroduced the Cobra version back into the Mustang lineup after taking a hiatus in 2002.