HUMMER H4

The Hummer HX is a concept Off-road vehicle/Compact SUV revealed on 8 January 2008 and manufactured by General Motors. The vehicle is smaller than both the H2 and H3 and is powered by a 3.6 L (~220 cu in) SIDI V6 that is E85 FlexFuel capable. A 2.4 L (~146 cu in) SIDI 4 cylinder option would likely be available as well, making it the very first Hummer with a four-cylinder engine.More compact