The 2011 Porsche Cayenne is available as a 4-door, 5-seat sport utility. Starting at $47,700, the 2011 Porsche Cayenne Base (M6) 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. The top of the line 2011PorscheCayenneTurbo , priced at $ 106,000 , is powered by a 4.8L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 22-mpg on the highway.