The 2018 Porsche 911 is available as a 2-door, 4-seat coupe. Starting at $161,800, the 2018 Porsche 911 Turbo (PDK) AWD Coupe is powered by a 3.8L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 24-mpg on the highway. The top of the line 2018Porsche911Carrera T RWD Coupe , priced at $ 102,100 , is powered by a 3.0L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 25-mpg on the highway.