The 2004 Porsche Cayenne is available as a 4-door, 5-seat sport utility. Starting at $88,900, the 2004 Porsche Cayenne Turbo is powered by a 4.5L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 18-mpg on the highway. The top of the line 2004PorscheCayenneV6 , priced at $ 42,900 , is powered by a 3.2L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 19-mpg on the highway.