The 2020 Porsche 718 Cayman is available as a 2-door, 2-seat coupe. Starting at $99,200, the 2020 Porsche 718 Cayman GT4 is powered by a 4.0LL , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway. The top of the line 2020Porsche718 CaymanT , priced at $ 66,400 , is powered by a 2.0LL , 4 - cylinder engine mated to a manual transmission that returns an EPA estimated 20-mpg in the city and 26-mpg on the highway.