The 2018 Maserati Quattroporte is available as a 4-door, 5-seat sedan. Starting at $111,800, the 2018 Maserati Quattroporte AWD is powered by a 3.0L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway. The top of the line 2018MaseratiQuattroporteGTS GranSport RWD , priced at $ 136,600 , is powered by a 3.8L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 22-mpg on the highway.