Like certain Chevrolet Colorado and GMC Canyon trims with which it shares its architecture, the Hummer H3 draws power from a five-cylinder engine (thankfully, the Chevy and GMC’s four-cylinder is not offered on the H3). Last year, that equated to 3.5-liters with 220 horsepower and 225 lb.-ft. of torque. Not bad, until you consider the H3’s 4,700-lb. curb weight. Sensing a need for better performance, the 2007 H3 (and Colorado/Canyon twins) soldiers on with a five-shooter, though displacement has been bumped up to 3.7 liters with 242 now being the magic number for horsepower and torque. Transmission choices include a standard five-speed manual or an optional four-speed automatic.