The 2014 Porsche Cayenne is available as a 4-door, 5-seat sport utility. Starting at $49,600, the 2014 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 2014PorscheCayenneDiesel Platinum Edition , priced at $ 66,900 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway.