The 2003 Ford Mustang is available as a 2-door, 4-seat coupe. Starting at $17,720, the 2003 Ford Mustang Standard (100A) Coupe is powered by a 3.8L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway. The top of the line 2003FordMustang- 10th Anniversary Package SVT Convertible , priced at $ 39,275 , is powered by a 4.6L , 8 - cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway.