HUMMER HX Concept Info

Quick-Jump Guide
HUMMER HX Introduction
HUMMER HX Price Information
HUMMER HX Fuel Economy
HX’s Removeable Parts
HX’s Interior
Off-Road Ready
Specifications and Dimensions
Off Road Clearances
HUMMER HX Photos, Videos, Sketches, and Accessories

HUMMER HX Concept Introduction

The HUMMER HX Concept vehicle debuted at the Detroit Auto Show in early 2008. Since then, much has been rumored about its production version, which is expected to be named the H4.

While we don’t know for sure when and if production will start (first, a successful sale of HUMMER must take place), we can go into detail about HX concept vehicle.

The HUMMER HX is designed to get you through the most impressive off-road obstacles unscathed with its welded steel frame, 13 inches of ground clearance, and complete undercarriage protection which includes a front skid plate and powertrain protection.

The HX is impressive in the water — it has the ability to ford 24 inches at 5 mph. You’ll be able to avoid most hang-ups with the HX’s astounding 56 degree approach angle and its 51 degree departure angle.

Under the hood of the HX is the 3.6L V6 engine, which turns out 304 hp at 6300 rpm and 273 lbs-ft of torque at 5200 rpm. The 3.6L engine is high-tech and lightweight, creating a balance between performance and fuel economy.

More compact than an H3, the HX is only 81 inches wide with a 103-inch wheelbase.

The HX’s compact dimensions and almost no overhangs make it prepared for almost any terrain. And, like all HUMMER production models, the HX has sturdy, body-on-frame construction, onto which is mounted front and rear independent suspensions.

HUMMER HX Pricing Information

Currently, there is no price on the HUMMER HX since it is just a concept vehicle. However, if HUMMER were to bring a vehicle of this size into production, it is expected that the base price tag would be between $24,000 and $30,000.

HUMMER HX Fuel Economy

Just as we don’t have official pricing information on the HX, we do not have fuel economy numbers. Considering the HX’s size and 3.6L engine, experts suggest that a production version of the concept could get between 20 and 30 MPG.

HUMMER HX Removable Parts

Open-air driving is in HUMMER’s genes — just look at the removable top HUMVEE and H1 civilian models. To carry on the tradition, the HUMMER HX has two removable roof panels about the driver and passenger seats, in addition to a removable rear roof assembly. With all three panels removed, the HX is a true convertible HUMMER.

Several different roof configurations were designed for the HX, including the option to operate as an SUT, a slant-back, or traditional wagon style that affords more cargo space.

In addition to the roof panels, the doors and fender flares are also removable. The removable doors are taken off by removing the pins in the outward facing hinges, and the removable fender flares are equipped with quick-release fasteners. Removing the composite flares can provide for additional clearance on the trail.

HUMMER HX Interior

The interior of the HUMMER HX was designed with an aeronautical theme, which includes helicopter-style seats and integrated off-road tools.

“Aeronautical parts are designed to be both lightweight and strong, and that is the feeling exuded by the HX’s cabin,” said Stuart Norris, interior design manager. “There isn’t superfluous trim or decoration – it is a purposeful design that conveys beauty through strength.”

Mounted on aircraft-style tracks, the seats in the HX were constructed with a lightweight framework and minimal components. Covering the seats is a lightweight, weather-resistant neoprene material.

The HX seats four, with second row bucket seats which can be removed to increase cargo capacity.

In between the front seats sits the cavernous center console, which is also houses the shifter (which mounts low and out of the way when in park) and the engine start button which is enclosed by a spring-loaded cover. Since the HX isn’t equipped with a conventional radio, the console also has a resting area for your iPod, iPhone, or MP3 player — any of which can be plugged in via USB to the integrated speakers.

A rubberized floor and ballistic nylon-material covering on the instrument panel and other interior components reinforce the functional aesthetic.

HUMMER HX: Off-Road Ready

The HX front suspension features an electronic-disconnecting stabilizer bar for enhanced maneuverability when driving off road, and the rear suspension is located with CNC-machined, billet trailing arms. Heavy-duty shocks with piggyback reservoirs were custom-made for the HX by renowned racing shock manufacturer Fox; one is mounted at each wheel position.

A full-time 4WD system pulls the HX over, through and around off-road obstacles. It transfers torque to the front and rear axles, each of which is equipped with a locking differential. The torque meets the trail via custom 35-inch-tall off-road tires that are mounted on a set of custom, bead-lock-style wheels that have a two-tone appearance; dark-painted wheel centers complemented by silver-anodized outer rims.

A complete underbody armor kit, including a front skid plate, powertrain protection and more, protects the HX from wayward rocks and other potentially damaging objects. A power-operated winch is located in the front bumper, and the HX has recovery hooks mounted on the front and rear bumpers, just in case its help is required for wrangling others out of unfortunate off-road situations.

HUMMER HX Specifications and Dimensions


Body style / driveline

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


welded steel frame, electrogalvanized 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

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 controlled 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)

Wheel size:

20-inch x 9-inch

HUMMER HX Exterior Dimensions


171 in.


81.0 in.

Track Width Front/Rear

67 in./68 in.


72 in


103 in.

HUMMER HX Off-Road Clearances

Ground Clearance

13 inches

Approach Angle

56 degrees

Departure Angle

51 degrees

Breakover Angle

25 degrees

Side Slope Capability

40 percent

Grade (upslope) Capability

60 percent

5 MPH Water Fording Capability

24 in.

HUMMER HX Pictures, Videos, Sketches, and Accessories

HUMMER HX Exterior Video

HUMMER HX Exterior Pictures

HUMMER HX Interior Video

HUMMER HX Interior Pictures

HUMMER HX Sketches and Accessories


Approach Angle: When viewed from the side, this is the angle between the ground and a line running from the front tire to the lowest-hanging point directly in front of it, which is usually the front bumper. This angle gives an indication of how the vehicle can approach a steep incline and its ability to climb up objects like rocks and other obstacles without damaging the front bumper.

Breakover Angle: This angle is a measurement of a vehicle’s ability to drive over a sharp ridge without touching its underside. The “included” angle measures the angle inside the ramp, and the “excluded” angle measures the included angle to the vehicle’s horizontal. A shorter vehicle with large tires will have the best (largest) breakover angle. Most SUVs run around 20 degrees “excluded” breakover angle.

Departure Angle: The angle between the ground and a line running from the rear tire to the lowest-hanging point directly behind it, which is usually the rear bumper or trailer hitch. Similar to the approach angle, this angle indicates how the vehicle can depart a steep incline and its ability to exit off of rocks and other obstacles without damaging the rear bumper.

Grade (upslope) Capability: The percentage grade of a hill that a truck is capable of driving/climbing up.

Side Slope Capability: The percentage grade of a hill that a truck can traverse.

Water Fording Capability: The depth of water through which the truck can drive.