The 2001 Isuzu Trooper is available as a 4-door, 5-seat sport utility. Starting at $27,470, the 2001 Isuzu Trooper S 4x2 is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 19-mpg on the highway. The top of the line 2001IsuzuTrooperLimited (A4) 4x4 , priced at $ 35,115 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 19-mpg on the highway.