The 2004 Maserati Spyder is available as a 2-door, 2-seat convertible. Starting at $85,542, the 2004 Maserati Spyder GT is powered by a 4.2L , 8 -cylinder engine mated to a manual transmission that returns an EPA estimated 11-mpg in the city and 17-mpg on the highway. The top of the line 2004MaseratiSpyderCambiocorsa , priced at $ 89,622 , 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.