The 2010 Hyundai Sonata is available as a 4-door, 5-seat sedan. Starting at $18,700, the 2010 Hyundai Sonata GLS (M5) is powered by a 2.4L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 21-mpg in the city and 32-mpg on the highway. The top of the line 2010 Hyundai Sonata Limited w/PZEV (A5), priced at $24,550, is powered by a 2.4L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 32-mpg on the highway.