The 2007 Porsche 911 is available as a 2-door, 4-seat coupe. Starting at $122,900, the 2007 Porsche 911 Turbo (M6) AWD Coupe is powered by a 3.6L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway. The top of the line 2007Porsche911RS RWD Coupe , priced at $ 123,200 , is powered by a 3.6L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 15-mpg in the city and 22-mpg on the highway.