The 2012 Chevrolet Sonic is available as a 4-door, 5-seat sedan. Starting at $13,865, the 2012 Chevrolet Sonic 1LS Sedan is powered by a 1.8L, 4-cylinder engine mated to amanual transmission that returns an EPA estimated 26-mpg in the city and 35-mpg on the highway. The top of the line 2012 Chevrolet Sonic 2LZ Hatchback, priced at $18,625, is powered by a 1.8L, 4-cylinder engine mated to anautomatic transmission that returns an EPA estimated 25-mpg in the city and 35-mpg on the highway.