The 2008 Jeep Grand Cherokee is available as a 4-door, 5-seat sport utility. Starting at $29,420, the 2008 Jeep Grand Cherokee Laredo 4x2 is powered by a 3.7L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway. The top of the line 2008JeepGrand CherokeeSRT8 4x4 , priced at $ 41,575 , is powered by a 6.1L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 11-mpg in the city and 14-mpg on the highway.