The last time we found ourselves behind the wheel of an H3, it was powered by the only engine available at the time, a 3.5L I5. Since then, the I-5 has grown to 3.7L and received a boost in power, but ...

1.4L I-4 gasoline direct injection, DOHC, variable valve control, intercooled turbo, premium unleaded, engine with 150HP (1) 1.5L I-4 gasoline direct injection, DOHC, i-VTEC variable valve control, ...

Zipping around in the Hummer H3 just got even more fun thanks to the introduction of a new, more powerful 3.7L five-cylinder engine. This new powerplant boasts a welcome 22 more horsepower and 17 ...