2008 hummer h3 review this car review is specific to this model, not the actual vehicle for sale. The hummer h3 suv is a mid-sized, five-passenger sport utility vehicle that carries the military-inspired design cues and amazing off-road capabilities of the hummer h1 and h2, but puts them in a smaller, more affordable package. The base h3 and h3x are powered by a 242-hp, 3. 7-liter, inline five-cylinder engine bolted to a 5-speed manual transmission. The h3 alpha brings v-8 power for increased towing and stronger acceleration. Standard safety features include: anti-lock brakes, stability and traction control, frontal and curtain side-impact airbags, onstar and a tire-pressure monitoring system. For 2008, the hummer h3 adds the 300-hp v-8 powered alpha to the line-up. Anti-lock Brakes