2008 Hummer H3 - Engines & Power: Standard Engine 3.7L 242 hp I5,Horsepower 242 @ 5600 RPM, Torque (lb-ft) 242 @4600 RPM. Transmissions: 4-Speed Automatic Overdrive, 5-Speed Manual Overdrive. Safety: Airbags, ABS Brakes, Traction Control, Stability Control