The 2010 Porsche 911 is available as a 2-door, 4-seat coupe. Starting at $95,100, the 2010 Porsche 911 Carrera 4S AWD Coupe is powered by a 3.8L, 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 2010 Porsche 911 GT3 RS RWD Coupe, priced at $132,800, is powered by a 3.8L, 6-cylinder engine mated to a manual transmission that returns an EPA estimated 14-mpg in the city and 20-mpg on the highway.