The 2012 Maserati GranTurismo is available as a 2-door, 4-seat coupe. Starting at $123,000, the 2012 Maserati GranTurismo S Automatic Coupe is powered by a 4.7L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 21-mpg on the highway. The top of the line 2012MaseratiGranTurismoSport Convertible , priced at $ 142,800 , is powered by a 4.7L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 20-mpg on the highway.