Humming . . .

Detroit Auto Show Previews Newest Car Models
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The Hummer H4 or HX is a proposed SUV reportedly in development by the General Motors Hummer division. GM may have a finished model to introduce to the market in 2008 or 2009. It is expected to compete with the Jeep Wrangler for market share. The development on new Hummer models so far has been towards SUVs that are more suitable for city traffic, a development which culminated in the Hummer H3. However, the H4 is likely to be more basic, and the focus is once again on off-road ability.

The H4 will likely be smaller than the three previous Hummers (including the H1) and is reportedly conceived to compete with the Jeep Wrangler. The design and look of the H4 has not yet been decided as GM is still deciding on what platform to build the H4. It is, however, likely that the H4 will use a shortened version of the platform currently used by the H3.


  • Youthful, open-air entry-level-size HUMMER
  • Designed by a trio of young designers
  • Convertible body with removable roof panels and modular rear roof assembly
  • Easily removable fender flares and doors
  • Full-time 4WD with front and rear locking differentials
  • Aeronautically inspired interior with functional, lightweight design elements
  • Reconfigurable instruments for highway and off-road driving
  • 3.6L SIDI V-6 E85 FlexFuel engine with six-speed automatic transmission
With its unmistakable HUMMER design and a compact, go-anywhere driving ethic, the HUMMER HX concept challenges the hierarchy of the trail. HUMMER displayed the nimble, reconfigurable off-roader at the 2008 North American International Auto Show.

More compact than a HUMMER H3 – 81 inches (2,057 mm) wide, with a 103-inch wheelbase (2,616-mm) – the HX concept is an open-air, two-door off-road vehicle that packs the off-road acumen for which HUMMER has become legendary, along with an easily convertible body that acclimates to varied trail conditions, cargo needs or passenger whims. Its design is based on the ideas developed by a trio of young designers who are new to the HUMMER studio.

"The HX is HUMMER's vision an agile, trail-ready, open-air vehicle that fits the lifestyles of everyone who needs or wants to drive off road," said Martin Walsh, HUMMER general manager. "Of course, it carries exceptional off-road capability and the distinctive styling for which all HUMMERs are known."




Body style / driveline:

two-door, four-seat open-top, four wheel-drive


welded steel frame, electro galvanized steel

Engine type:

3.6L V-6 VVT (variable valve timing) with spark-ignition, direct injection

Displacement (cu in / cc):

217 / 3564

Bore & stroke (in / mm):

3.70 x 3.37 / 94 x 85.6

Block material:

sand-cast aluminum with cast-in bore liners

Cylinder head material:

cast aluminum


DOHC, 4 valves per cylinder, variable valve timing (VVT)

Fuel delivery:

direct high-pressure fuel injection

Compression ratio:


Horsepower (hp / kW @ rpm):

304 / 227 @ 6300 rpm (est)

Torque (lb.-ft. / Nm @ rpm):

273 / 370 @ 5200 rpm (est)

Fuel Type:

unleaded regular or E85 ethanol


Hydra-Matic 6L50 six-speed electronically control automatic transmission


front: independent SLA, custom Fox Racing coil-over shocks; 2-in shocks, 2.5-in springs

rear: semi-trailing link, custom Fox Racing coil-over shocks; 2-in shocks, 2.5-in springs

Wheel travel (in / mm):

front: 9 / 228
rear: 11/ 279


four-wheel disc; Brembo 6-piston calipers (front); Brembo 4-piston calipers (rear)

Rotor diameter x thickness (in / mm):

15 x 1.25 / 381 x 31.75

Wheel size & type:

20-inch x 9-inch


35-inch custom Bridgestone Dueler

Wheelbase (in / mm):

103 / 2616

Overall length:

171 / 4343

Overall width (in / mm):

81 / 2057

Overall height (in / mm):

72 / 1829

Track (in / mm):

67 / 1702 (front); 68 / 1727 (rear)

Minimum ground clearance front (in / mm):

13 / 320

Approach angle (degrees):


Departure angle (degrees):


Breakover angle (degrees):


Grade capability (percent):


Side slope capability (percent):


Water fording capability (in / mm):

24 / 610 (at 5 mph)

Seating capacity:


For more info checkout: HUMMERforums

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