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2006 HUMMER H1 Alpha

The new 2006 H1 Alpha, featuring GM’s award-winning Duramax 6600 diesel engine, is the first in HUMMER’s new performance series and represents the single greatest advance in the 14-year history of the original HUMMER. The H1 Alpha delivers more power, more torque, and enhanced on- and off-road capability, with significantly improved fuel economy. It represents HUMMER performance taken to its ultimate extension.

2006 H1 Alpha Photo Gallery

2006 H1 Alpha: The Original HUMMER’s Legendary Performance Reaches a New Level

Source: GM | Published: Tue Sep 27, 2005

As was the case for previous H1 models, the 2006 H1 Alpha is offered in both Open Top and Wagon models. The Duramax 6600 replaces the previous 6.5L Optimizer Turbo-Diesel, which continues as the power plant for the military HUMVEE. All commercial H1s produced for the 2006 model year will be H1 Alpha models.

HUMMER Alpha Performance: Best-Ever H1

The Duramax 6600 delivers 300 horsepower (223.5 kW) at 3,000 rpm, a 46-percent increase over previous H1s equipped with the 6.5L Optimizer Turbo-Diesel. Peak torque is a massive 520 lb-ft (719 Nm) at 1,500 rpm, an 18-percent increase.

The added power enhances the vehicle’s already-extreme off-road crawling and climbing capability. On the road, the new powertrain offers smoother, quieter and more comfortable operation, with better acceleration. Zero-to-60 acceleration improves by three seconds to 13.5 seconds.

In addition, preliminary testing indicates significantly improved fuel economy (mileage estimates not yet available). A revised fuel system also increases capacity of the H1’s two on-board tanks to 51.5 gallons (195L), 9.5 gallons (36L) more than previous H1s. The increased tank capacity combines with the efficiency of the Duramax to increase cruising range from 400 miles (643 km) to an estimated 570 miles (917 km) between fill-ups.

The five-speed automatic Allison 1000 transmission is extremely stout and durable, as it also is used in medium- and heavy-duty commercial trucks. It features a Tow/Haul mode that adjusts shift patterns for optimal performance when the vehicle is towing or carrying heavy loads. The Allison unit aids the H1 in severe maneuvers with features such as improved drivetrain braking and a crawl ratio of 45:1, an increase of 22 percent. ...HUMMER H1 Alpha: Page 2

Legend: AT - automatic transmission, MT - manual transmission
Type V8
Displacement 403 cu in (6599 cc)
Power 300 hp @ 3000 RPM
Torque 520 lb-ft @ 1500 RPM
Redline 3250
Driveline All Wheel Drive
Transmission 5 Speed Automatic
Brakes & Tires
Brakes Front - Rear Disc - Disc
Tire Size Front - Rear 37x12.50 R17LT
Exterior Dimensions & Weight
Length 184.5 in
Width 86.5 in
Height 77 in
Curb Weight 7213 lbs
0-60 13.5
1/4 Mile n/a
60-0 Braking n/a
Top Speed n/a
Grade Capability 60% (31°)
Side Slope Capability 40% (22°)
Approach Angle without winch: 72°
  with winch: 47°
Minimum Ground Clearance 16 in
Fording Depth 30 in
Fuel Economy
EPA Fuel Mileage - City/Highway n/a
Origin & Price
Origin United States of America
Base Retail Price (MSRP) n/a

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