At low speeds with the inline-5, there is sufficient punch to handle the cut and thrust of city driving. But when faced with freeway merging and inclines, the 2009 Hummer H3T grows winded, a result of its insufficient power for the vehicle’s 4,900 pounds and bricklike aerodynamic efficiency. The H3T Alpha fares better. Throttle response is crisper with the V8 and it pulls harder through the midrange, but again, due to the considerable mass at hand, it’s not the massive transformation one might expect.

Even though the H3T’s longer wheelbase makes it less maneuverable on trails than the regular H3, it’s still basically unstoppable when equipped with the Adventure Package. With 9.5 inches of ground clearance, loads of wheel travel, aggressive approach and departure angles, oversized all-terrain tires and standard skid plates, the H3T can pretty much go anywhere without taking damage. Given this off-road capability, the H3T performs admirably on pavement, with decent stability at speed. The ride is surprisingly smooth and belies the H3′s tough-truck nature. But we would still advise you to steer clear of the H3T if you never intend to take it off the beaten path.

All 2009 Hummer H3T models come with full-time four-wheel drive with a two-speed transfer case. All except the Alpha are powered by a 3.7-liter inline five-cylinder engine that makes 239 hp and 241 lb-ft of torque. The standard transmission is a five-speed manual, and a four-speed automatic is optional. Although the five makes decent power, it’s simply outmatched by the H3T’s near-5,000-pound mass, so acceleration is leisurely at best. Towing capacity is rated at 4,400 pounds when properly equipped, and EPA fuel economy estimates stand at 14 mpg city/18 mpg highway and 15 mpg combined with either transmission.

The Alpha features a 5.3-liter V8 (with 300 hp and 320 lb-ft of torque) mated to a four-speed automatic transmission. Towing capacity goes up to 5,900 pounds, and we’d expect its performance to be about the same as the H3 Alpha, which sprinted from zero to 60 mph in a relatively quick 8 seconds flat. With this engine, fuel economy drops slightly to a 13/16/14 mpg rating.

Vehicle model: 2009 Hummer H3T
Base price: TBA
Engine type: 3.7L I-5
Valvetrain: DOHC, four valves per cylinder
Aspiration: Natural
Mfg.’s hp @ rpm: 242 @ 5,600
Mfg.’s torque (lb-ft) @ rpm: 242 @ 4,600
Transmission: MA5 five-speed manual
Axle ratio: 4.56
Suspension (f/r): Independent SLA with torsion bar, stabilizer bar/Hotckiss leaf spring, stabilizer bar
Steering: Power-assisted rack-and-pinion
Brakes (f/r): 12.4-inch disc/12.3-inch disc with four-wheel ABS
Wheels/Tires: P265/75R16 Bridgestone Dueler
Wheelbase (in): 134
Length (in): 211.9
Width (in): 85.5
Height (in): 72.2
Track (in): 65/65.5
Curb Weight (lb): TBA
Ground clearance f/r (in): 9.1
Approach (deg): 37.5
Departure (deg): 28.0
Max Towing capacity (lb): 4,400, 5,900 (V-8)
Fuel capacity (gal): 27
EPA mileage estimates (mpg): TBA
Seating capacity: 5