The 2005 Chevrolet Cobalt is available as a 2-door, 5-seat coupe. Starting at $13,625, the 2005 Chevrolet Cobalt Base Coupe is powered by a 2.2L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 25-mpg in the city and 34-mpg on the highway. The top of the line 2005 Chevrolet Cobalt LT Sedan, priced at $18,195, is powered by a 2.2L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 32-mpg on the highway.