The 2010 Maserati Quattroporte is available as a 4-door, 5-seat sedan. Starting at $120,250, the 2010 Maserati Quattroporte Base is powered by a 4.2L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 11-mpg in the city and 17-mpg on the highway. The top of the line 2010 Maserati Quattroporte Sport GT S, priced at $134,200, is powered by a 4.7L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 11-mpg in the city and 18-mpg on the highway.