Edmunds First-Drive - HUMMER H3 V8

Discussion in 'OT Driven' started by TriShield, Jul 17, 2007.

  1. TriShield

    TriShield Super Moderator® Super Moderator

    Joined:
    Jul 6, 2001
    Messages:
    132,798
    Likes Received:
    1,698
    Location:
    PRESIDENTIAL TOWER, GREAT AGAIN, NY
    Assaulting Terrain With a New V8

    [​IMG]
    Nothing changes about the H3 Alpha's looks, so if you like your midsize SUV big and butch this is the truck for you.

    By Ed Hellwig, Senior Editor
    Date posted: 07-12-2007

    5.3-liter V8 - 300 horsepower - 320 lb-ft of torque - 0-60 mph in 8.0 seconds

    In order to create the new, more powerful 2008 Hummer H3 Alpha, the engineers at GM's off-road brand had to take a couple steps backward.

    The standard H3's inline five-cylinder might be technologically unique and suitably tractable for off-roading, but it's hopelessly overmatched by the H3's weight, especially on the road. So, sure enough, the Hummer engineers adopted an idea that's been around at GM for half a century — V8 power.

    With the 2008 Hummer H3 Alpha, GM hopes this addition to the H3 model range will broaden this SUV's appeal beyond the hard-core rock-crawling crowd. It's a logical move and it's long overdue.

    Not a Plug-and-Play Proposition

    [​IMG]
    This is what turns an H3 into an H3 Alpha. It's a 300-hp 5.3-liter V8 hooked to a four-speed automatic.

    When we grilled the Hummer engineers about the H3's overdue adaptation of V8 power, they offered up a number of explanations.

    For one, the H3 shares its frame with the Chevrolet Colorado/GMC Canyon pickup, which was never designed to accommodate a V8 engine. Since the space between the frame rails was sized only for the narrow inline-5, adding a V8 hasn't been a simple plug-and-play option.

    The engineers also note that Hummer has addressed the output of the five-cylinder by increasing its displacement from 3.5 to 3.7 liters. The H3's standard five-cylinder now produces 242 horsepower and 242 pound-feet of torque.

    But we must note that the engineers also shrugged their shoulders plenty of times, so it's clear that there's plenty of corporate acknowledgement of the I5's deficiencies.

    Add Some Aluminum, Then Some Iron, Too

    [​IMG]
    The H3 Alpha's shocks and torsion bars have been tuned for the engine's added weight, and you'd never know the difference over rough terrain.

    Sourcing a V8 for the H3 Alpha wasn't a problem, as Hummer settled on the same aluminum-block 5.3-liter V8 found in the latest Chevrolet Silverado/GMC Sierra pickup. In the H3 Alpha, this V8 is rated at 300 hp and 320 lb-ft of torque. These numbers are slightly below those produced by the engine in its pickup truck application because the H3 uses more extensive emissions hardware. Yes, the Hummer H3 Alpha emits fewer pollutants than its truck counterparts, so it's as green as it can be.

    Getting the wider V8 to fit into the H3 required several small modifications. Both the firewall and the frame rails had to be reshaped and new motor mounts added. A revised oil pan maintains the engine's oil pressure during off-roading across extreme terrain. Meanwhile, every 2008 H3, regardless of engine configuration, gets a revised rack-and-pinion steering system to improve road feel on the highway.

    Once the H3 had been altered to fit the V8, a few other specifications had to change for the Alpha model. Among other things, the lightweight aluminum differential has been replaced by an older but stronger cast-iron unit. "We had to make the switch to handle the extra torque of the V8," says Daryl Ehrlich, the H3's powertrain engineer. "Using cast iron adds a little weight, but it's very tough, so it's good for serious off-roading."

    And off-roading matters with the H3 Alpha. More than a third of H3 owners take their rigs off-road, the Hummer people tell us, and that's probably why the tractable inline-5 hasn't aroused more complaints, despite its anemic performance on the highway.

    A set of 4.10:1 axle gears comes standard with the H3 Alpha in place of the standard model's 4.56:1 ring-and-pinions, yet even with the taller gears the Alpha's maximum tow rating is up 1,500 pounds to 6,000 pounds. GM's fuel mileage estimates for the Alpha V8 are 13 mpg city/16 highway, not far off the standard inline-5's 2008 numbers of 14 mpg city/18 highway.

    Transformed It's Not

    [​IMG]
    You don't need a V8 to climb rocks like this, but it does make things a little easier.

    Although GM's 5.3-liter engine is a hearty motor, we're driving in Durango, Colorado, and the air is a little thin at 6,500 feet. Since horsepower declines about 3 percent per 1,000 feet of altitude, we expect the H3 Alpha will feel a little soft. Less oxygen doesn't keep it from sounding better, as the low, muscular hum from the V8's exhaust is just about right for a butch SUV like the H3. Compared to the raspy sound of the standard inline-5, the Alpha sounds like Bigfoot.

    As we head through town, the V8 doesn't make much of an impression. The throttle response is a little better and 1st gear has some real push to it, but it's not a transformation. After all, the H3 Alpha still weighs 4,854 pounds — 100 pounds more from the V8 and an additional 60 pounds from the cast-iron differential.

    It's not until we merge onto the highway that the added 58 hp and 78 lb-ft of torque produced by the V8 become a little more evident. While the inline-5 runs out of steam after 4,000 rpm, the V8 pulls hard through each gearchange. Not that there are very many of these, as a four-speed automatic is the only transmission choice for the Alpha.

    The Alpha actually has the power to pass slower vehicles, but you still need a good run to do it safely. There's also an added sense of refinement, as the V8 never sounds as labored as its five-cylinder counterpart.

    Hummer estimates acceleration to 60 mph in 8.0 seconds flat for the H3 Alpha. Given that we tested a V8-powered Toyota 4Runner four years ago that did it in 7.6 seconds, the H3 Alpha isn't exactly breaking new ground here.

    Even Better Off-Road

    [​IMG]
    Massive hole for the fuel filler aside, the Hummer H3 is a good-looking SUV from the rear.

    Once we get to the Hummer's natural habitat of boulders and sand washes, the H3 Alpha finally feels at home. At these speeds, the big V8 is less of an advantage, as the inline-5 had little trouble powering the big truck at 2-3 mph.

    It's still nice to have the V8's torque, instead of relying solely on the gears to do the work. Hummer has tuned the V8's throttle response specifically for off-road tractability, so even in the low range of the transmission's transfer case it's easy to roll on the power without spinning the wheels. A revision to the traction control system for 2008 also allows us to use left-foot braking without overriding the system, so it's even easier than before to pick our way over massive boulders.

    Once you add the Hummer off-road package with its locking differential, larger tires and 4:1 transfer-case gears, the H3 Alpha is one of the most seriously capable SUVs you can buy short of a Jeep Wrangler.

    Competing in a New Price Category

    [​IMG]
    Other than a few choice emblems, the Alpha's interior is standard-issue for the H3.

    The 2008 Hummer H3 Alpha naturally has its own exclusive interior trim and options list, and it adds up to a base price of $38,645, roughly $4,000 more than the base model with the same options.

    It looks like big money for an engine upgrade, but it's no more than you would pay for a V8-powered Toyota 4Runner or Jeep Grand Cherokee. And far less than a Volkswagen Touareg or Land Rover LR3.

    A V8 engine still doesn't make the 2008 Hummer H3 Alpha powerful enough to deliver carlike performance on the road, but it does give an added dimension of useful highway capability to what remains a hard-core off-road machine. If you're serious about the dirt, an H3 Alpha is what you want. The V8 just makes it possible to live through the time until you can get it dirty again.

    [​IMG]
     
  2. IslanderOffRoad

    IslanderOffRoad Do you even lift kit? OT Supporter

    Joined:
    Dec 23, 2003
    Messages:
    73,597
    Likes Received:
    249
    Location:
    Houston, Tx
    Which is cheaper, gets better gas mileage, and looks better.

    I'd get the Jeep
     
  3. BigT

    BigT LSX Crew

    Joined:
    Nov 4, 2001
    Messages:
    22,696
    Likes Received:
    24
    Location:
    Virginia
    Much better, so does this mean Colorado/Canyon will get a v8 now?
     
  4. TriShield

    TriShield Super Moderator® Super Moderator

    Joined:
    Jul 6, 2001
    Messages:
    132,798
    Likes Received:
    1,698
    Location:
    PRESIDENTIAL TOWER, GREAT AGAIN, NY
    Yes, both will offer the same V8 now.
     
  5. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    link to that? I didn't hear anything about the canyon with a v8?
     
  6. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    That plastic engine cover sure is pretty. So's the chrome grille and fake heli-drop hooks. And the fake snorkel boxes. And the fake plastic crash bar on the front. And and and and...

    Suffice it to say, if there were a prison for trucks, that thing would get raped twice a night it's so pretty.
     
  7. bubbaZR2

    bubbaZR2 i poop too much, then i get tired... OT Supporter

    Joined:
    Oct 27, 2003
    Messages:
    49,038
    Likes Received:
    93
    Location:
    New Mexico
  8. Ronin

    Ronin Guest

    interiors seem to be getting better
     
  9. jimmybuffett

    jimmybuffett New Member

    Joined:
    Oct 11, 2004
    Messages:
    16,236
    Likes Received:
    0
    Location:
    Arkansas
    its like a neon srt4. powerful and fast or not, its still a piece of shit neon

    either way, my jeep with an inline 6 is as capable as that heavy hunk of shit
     
  10. deusexaethera

    deusexaethera OT Supporter

    Joined:
    Jan 27, 2005
    Messages:
    19,712
    Likes Received:
    0
    Nah, the SRT4 was a cool car. It's just most of them blew up because people pounded on them mercilessly.
     
  11. jimmybuffett

    jimmybuffett New Member

    Joined:
    Oct 11, 2004
    Messages:
    16,236
    Likes Received:
    0
    Location:
    Arkansas
    if it had the 4.5L diesel id be impressed
     
  12. alltracman78

    alltracman78 New Member

    Joined:
    Nov 11, 2006
    Messages:
    316
    Likes Received:
    0
    When people say it's a piece of shit they don't mean the engine, it was the only thing worth anything on them.
    That engine was pretty stout.
     
  13. Oman4x4

    Oman4x4 OT Supporter

    Joined:
    Sep 22, 2004
    Messages:
    9,359
    Likes Received:
    23
    Location:
    Dubai / Oman / Saudi Arabia
    Only good thing to come of this is... if enough idiots buy it, Jeep will put the 5.7L Hemi in the Wrangler.
     
  14. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    H3 >>>>>>>>>>>>>> Jeep
     
  15. bubbaZR2

    bubbaZR2 i poop too much, then i get tired... OT Supporter

    Joined:
    Oct 27, 2003
    Messages:
    49,038
    Likes Received:
    93
    Location:
    New Mexico
    Jeep>>>>>>>>>>>>>> H3

    IFS is the worst invention ever. Solid axle FTW
     
  16. IslanderOffRoad

    IslanderOffRoad Do you even lift kit? OT Supporter

    Joined:
    Dec 23, 2003
    Messages:
    73,597
    Likes Received:
    249
    Location:
    Houston, Tx
    Re read the article, specifically the part I quoted
     
  17. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    The H3 is more powerful, looks better, will have better resale, and is something that is actually COMFORTABLE to daily-drive while being immensely capable offroad.

    If I wanted a vehicle that I would trailer to base of the mountain, and run without emissions with behemouth knobbies and just use it for the trails, then yes, a *modified* jeep is a vehicle to consider.

    However, when considering stock-for-stock I think the jeep is not more capable, and the H3 is an extremely better choice for a daily driver.
     
  18. bubbaZR2

    bubbaZR2 i poop too much, then i get tired... OT Supporter

    Joined:
    Oct 27, 2003
    Messages:
    49,038
    Likes Received:
    93
    Location:
    New Mexico
    since you have such a hard on for hummers... check this out.

    http://youtube.com/watch?v=lpxoomyFs_0


    Sure a locker and 33s (H3) 35s (h2) from the factory are nice, but they are nowhere near as capable as a Jeep. H1s are big turds that cant fit anywhere but the Iraqi desert. H2s are underpowered despite having a good V8, again they are too big to go anywhere, and their weak as glass IFS breaks anytime you try to go somewhere. H3s arent bad for what you said. Daily drive and occasionally take it to the sticks, but it will in no way shape or form do the things a comparably equipped Jeep will do.

    Solid axle for the win. no question about it. IFS speaks for itself "I Fucking Suck"
     
  19. affende

    affende Resident 4X4 Elitest Prick

    Joined:
    Apr 21, 2005
    Messages:
    6,948
    Likes Received:
    0
    Location:
    in your balloon knot
    ehl oh ehl .... i guess that settles that debate.
     
  20. TriShield

    TriShield Super Moderator® Super Moderator

    Joined:
    Jul 6, 2001
    Messages:
    132,798
    Likes Received:
    1,698
    Location:
    PRESIDENTIAL TOWER, GREAT AGAIN, NY
    If you ever have to drive your new off-roader on an actual road, ha ha no. As for breaking, I used to be into the off-road thing and Jeeps break things all the time. I owned one and when a powertrain part wasn't busted it always had something wrong with it otherwise.

    When Chrysler steps up and offers a V8 in the new Wrangler then I'll be impressed.
     
  21. affende

    affende Resident 4X4 Elitest Prick

    Joined:
    Apr 21, 2005
    Messages:
    6,948
    Likes Received:
    0
    Location:
    in your balloon knot
    CV shafts are the ish offroad. so many aftermarket upgrades and .... stuff ... you know?
     

Share This Page