The 2010 Jeep Liberty is available as a 4-door, 5-seat sport utility. Starting at $23,255, the 2010 Jeep Liberty Sport 4x2 is powered by a 3.7L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway. The top of the line 2010JeepLibertyRenegade 4x4 , priced at $ 27,860 , 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 21-mpg on the highway.