Developed for markets around the world and built in South Africa, the H3 adds unique styling features to the brand's iconic shape, an all-new interior design and a 180 kW (244 hp) 3.7 l Vortec inline 5-cylinder engine with, for the first time on a HUMMER, a choice of manual or automatic transmissions for the full-time four-wheel-drive system.H3 packs authentic HUMMER style and capability into more compact dimensions. Compared to the HUMMER H2, the H3 is 39 mm shorter in length, 171 mm shorter in height and 73 mm narrower. Roughly the same length as a larger family sedan, H3 can navigate city traffic, yet still deliver HUMMER's trademark crawling and climbing capability.