lb-ft @ 4000 rpm
hp @ 5200 rpm
lbs per hp
hp per liter
(from General Motors
Press Release) V-8-POWERED H3 ALPHA EXPANDS HUMMER’S RANGE OF
Newest model in the
performance-bred Alpha series
Powerful 5.3L V-8
powertrain offers 295 hp (224 kW)*
increased to 6,000 pounds (2,721 kg) – a 33-percent increase
Unique exterior and
interior features, including Alpha badging
NEW YORK –Offering the
towing capability that only a V-8 can, the 2008 H3 Alpha broadens
HUMMER’s range of versatile, do-anything and go-anywhere vehicles.
HUMMER announced the H3 Alpha at the New York Auto Show; it goes on
sale this summer.
The H3 Alpha is the second member of HUMMER’s exclusive Alpha
series, representing the pinnacle of performance, both off the road
and on it. It comes with a new, 5.3L V-8 engine that delivers 295
horsepower (224 kW)* and 317 lb.-ft. of torque (438 Nm)*. It is
partnered with a four-speed automatic transmission and enables a
maximum towing capacity of 6,000 pounds (2,721 kg) – an increase of
more than 33 percent over other H3 models
“H3 Alpha is, simply, the ultimate HUMMER H3,” said Martin Walsh,
HUMMER general manager. “It delivers all of H3’s renowned off-road
capability, but with enhanced performance that is suited to a
variety of lifestyles.”
In addition to the V-8 engine, the H3 Alpha also includes the
popular “Luxury” equipment package, the Chrome Appearance package,
16-inch chrome wheels, a 4.10 rear axle ratio and special Alpha
identification, including a prominent tailgate badge, horn pad badge
and embroidered front headrests with the “Alpha” insignia.
For customers who want a more accessorized appearance straight from
the factory, the Alpha model can be combined with the H3 X content,
which includes bright roof crossbows, chrome fuel door, a body-color
grille and unique spare tire cover, tires, wheels and center cap,
and a brush guard. Additionally, HUMMER Accessories offers an
exclusive line of GM-designed, manufactured and validated
accessories that are engineered and tested for no-compromises fit,
finish and performance.
“Because HUMMER stands for more than just off-road performance, the
H3 Alpha builds on the style and refinement of the H3 lineup and
offers a unique, instantly recognizable statement on the road,” said
Walsh. “In short, the H3 Alpha matches HUMMER’s off-road
expectations with on-road attitude.”
Alpha – the ultimate HUMMER
HUMMER Alpha models
represent the top in performance, capability and comfort. The H1
Alpha was the first of these ultimate HUMMERs, and like the H3
Alpha, it offered a more powerful engine as well as unique styling
and comfort features.
The H3 is the newest model to carry the Alpha flag, and represents
HUMMER’s first Alpha model engineered in conjunction with GM
Award-winning interior and safety
The H3 Alpha shares the
same widely admired interior as all H3 models, including detail
revisions and enhancements that have been implemented across the
lineup. New child safety locks for the rear doors and easier-to-use
power window switches were introduced during the ’07 model year and
reflect customers’ input.
“Details matter, and our customers told us these details were
particularly important, so we updated the H3 lineup to address
them,” said Walsh.
Also new for the H3 Alpha and the entire 2008 H3 lineup are standard
head curtain side air bags; they were previously optional.
Additional standard safety features now found on all H3 models
electronic stability control system
brakes with traction control
Dual front air bags
with Passenger Sensing System
LATCH rear child
HUMMER’s Rear Vision
system and a navigation system are available. The Rear Vision system
uses a camera mounted near the rear bumper to provide a view of
objects directly behind the vehicle. Also, the safety and security
of OnStar is standard, and its new Turn-By-Turn Navigation feature
The H3 Alpha’s 5.3L
engine is a powerful and efficient member of GM’s legendary
small-block V-8 family. It is rated at 295 horsepower (224 kW)* and
317 lb.-ft. of torque (438 Nm)*; and is similar to the small-block
V-8 found in the Chevy Silverado, which was named the 2007 Truck of
the Year at the North American International Auto Show.
“For jobs such as towing personal watercraft up a mountain to the
lake, the small-block V-8’s torque performs with effortless ease and
little impact on fuel mileage,” said Christopher Meagher, assistant
chief engineer of small-block V-8 truck engines. “The 5.3L engine
greatly broadens the H3’s towing capability.”
Effortless highway driving also is an attribute of the 5.3L V-8,
which enables 0-60 mph performance of approximately eight seconds.
“All of the powertrain options in the H3 lineup deliver performance
suited to different driving styles and needs,” said Meagher. “But
when it comes to certain tasks such as towing, there is sometimes no
substitute for a V-8 engine.”
An aluminum cylinder block is used with the H3 Alpha’s engine. It
helps reduce overall mass and maintains a more desirable
front-to-rear weight balance. Like all of GM’s small-block V-8
engines, highlights include:
block with cross-bolted main caps
58X ignition system
pistons with full-floating wrist pins
GM’s small-block V-8
engines are engineered to meet today’s more stringent emissions
standards. In fact, the H3 Alpha’s V-8 engine beats the deadline for
new, U.S. federal emissions standards by a year. And compared to
truck engines of a decade ago, the small-block engine family is
approximately 90 percent cleaner. Cast iron exhaust manifolds
matched with four close-coupled catalytic converters help reduce
cold-start emissions, which is the largest source of vehicle
A Hydra-Matic 4L60 electronically controlled four-speed automatic
transmission is paired with the H3 Alpha’s V-8 engine. And, as with
all H3 models, flat-towing is enabled.
New V-8 drives vehicle-wide
HUMMER H3 and GM
Performance Division engineers did more than simply shoehorn a V-8
engine into the H3’s engine compartment. Accommodating the new power
plant necessitated the execution of a seemingly endless number of
technical details – many of which have been implemented across the
entire H3 lineup.
The H3’s frame was modified to accept the V-8 engine, and a special
oil pan was designed to ensure constant oil pressure when driving on
steep grades – a hallmark of HUMMER’s off-road capability. Also, the
engine compartment front of dash was modified to accommodate the
V-8, and a new steering system is used on all H3 models to deliver
better on-center feel and even more improved off-road reliability.
To support the torque output of the powerful V-8, the H3 Alpha’s
front differential case is made of cast iron; other models feature
an aluminum case. New engine mounts, higher torsion bar rates to
support the increased mass, and specific shock valving also are
unique to the V-8-powered model, ensuring it continues to deliver
the unparalleled ride quality – both on- and off-road – that
All of the chassis and suspension changes were validated in
real-world testing on off-road trails in Moab, Utah, the Rubicon
Trail and other challenging off-road venues.
“Our engineers live, breathe and eat off-road driving,” said Walsh.
“To say they sweat the details is an understatement.”
A HUMMER by any measure
All H3 models pack
HUMMER’s trademark capability into a midsize package. Compared to
the H2, the H3 is 16.9 inches (429 mm) shorter in length, six inches
(152 mm) shorter in height and 6.5 inches (165 mm) narrower. Roughly
the same length as a midsize family sedan, H3 comfortably navigates
city traffic and fits nicely in parking garages.
The H3 lineup also delivers exceptional rock crawling and climbing
performance; it was engineered for off-road leadership among midsize
SUVs. The heart of this capability is its electronically controlled
four-wheel-drive system and suspension tuning tailored for off-road
performance. In addition, the H3 features standard underbody
shielding, brake traction control, and an optional 4.03:1 transfer
case with rear locking differential.
Among its off-road credentials, the H3 can ford 24-inch (610 mm)
streams at a 5-mph pace, climb 16-inch (407 mm) vertical steps and
rocks, make its way through deep sand and race easily over sandy
H3’s more maneuverable size provides advantages, such as a 37-foot
turning circle that is about the same as a typical compact car,
making easy work of parking lot maneuvers and tight turns when off-roading.
The 9.1-inch (231 mm) ground clearance and maximum breakover angle
of 25 degrees (with 33-inch tires) both make it possible to clear
large obstacles in off-road driving. Serious off-road performance is
also aided by the maximum approach angle of 39 degrees and maximum
departure angle of 37 degrees. These approach and departure angles
permit the H3 to drive into a hole and back out again, without
getting hung up in the front or rear.
The H3 is sold in 34 countries, with production in the United States
and South Africa .