The 2012 Maserati Quattroporte is available as a 4-door, 5-seat sedan. Starting at $127,250, the 2012 Maserati Quattroporte Base is powered by a 4.7L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 12-mpg in the city and 19-mpg on the highway. The top of the line 2012 Maserati Quattroporte Sport GT, priced at $135,200, is powered by a 4.7L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 12-mpg in the city and 19-mpg on the highway.