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Old 10-30-2015, 11:49 PM
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Why 5.7 horsepower discrepancy?

The 5.7 in the GC is rated at 360hp/390lb-ft.
The 5.7 in the Ram pickup is rated at 383hp/400lb-ft.
The 5.7 in the (silly looking) new Ram Rebel is rated at 395hp/410lb-ft.

So I wonder what the differences are and why the 395hp version couldn't be offered in GC? It would be nice.

BTW, today on the Jeep site, 2016s are available to 'build' on all Jeep models except GC... ?

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Old 10-30-2015, 11:55 PM
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Re: Why 5.7 horsepower discrepancy?

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Originally Posted by Nikita View Post
The 5.7 in the GC is rated at 360hp/390lb-ft.
The 5.7 in the Ram pickup is rated at 383hp/400lb-ft.
The 5.7 in the (silly looking) new Ram Rebel is rated at 395hp/410lb-ft.

So I wonder what the differences are and why the 395hp version couldn't be offered in GC? It would be nice.

BTW, today on the Jeep site, 2016s are available to 'build' on all Jeep models except GC... ?
I have a 2011 Dodge Ram Sport with the Hemi 5.7 and it has 390hp.
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Old 10-31-2015, 02:10 AM
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Re: Why 5.7 horsepower discrepancy?

The different HP ratings for the exact same Chrysler 5.7L Hemi's can be attributed to the different intakes and exhaust manifolds on the various Hemi versions. Also note that the engine bays in the Ram trucks offer more room for bigger better flowing exhaust manifolds that lead to higher HP numbers than the tighter Grand Cherokee engine bays will allow. To sum it up.....they make them breath better!
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Old 10-31-2015, 09:38 AM
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Why 5.7 horsepower discrepancy?

Fords EcoBoost has different outputs for the truck vs suv, too.

You should be content with what the Hemi has in the GC, after all Chrysler is the only brand that offers a V8 in a crossover. Specifically without having to step up to a performance model.

Shop around for any other crossover and you're stuck with a V6 that has output of around 290hp.
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Old 10-31-2015, 09:55 AM
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Originally Posted by overlanding View Post
Fords EcoBoost has different outputs for the truck vs suv, too.

You should be content with what the Hemi has in the GC, after all Chrysler is the only brand that offers a V8 in a crossover. Specifically without having to step up to a performance model.

Shop around for any other crossover and you're stuck with a V6 that has output of around 290hp.
Except the grand isn't a crossover. Tell me what car it's based on?
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Old 10-31-2015, 10:40 AM
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Re: Why 5.7 horsepower discrepancy?

Quote:
Originally Posted by Raptor View Post
The different HP ratings for the exact same Chrysler 5.7L Hemi's can be attributed to the different intakes and exhaust manifolds on the various Hemi versions. Also note that the engine bays in the Ram trucks offer more room for bigger better flowing exhaust manifolds that lead to higher HP numbers than the tighter Grand Cherokee engine bays will allow. To sum it up.....they make them breath better!
Exactly!
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Old 10-31-2015, 11:46 AM
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Re: Why 5.7 horsepower discrepancy?

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Originally Posted by Strongjeff View Post
Except the grand isn't a crossover. Tell me what car it's based on?

True. But it's not on a 'truck' platform either so...
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Old 10-31-2015, 02:30 PM
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Re: Why 5.7 horsepower discrepancy?

In 2013, the Rams went to electric power steering, which netted another 5 HP. So as of 2013, all Rams (at least the ones with the 8-speed transmission, possibly all) with the 5.7 Hemi are at 395 instead of the original 390.

And as others stated, the exhaust is reportedly the culprit in the WK2s.
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Old 10-31-2015, 02:45 PM
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Re: Why 5.7 horsepower discrepancy?

The Grand Cherokee has a unibody construction, as opposed to a body-on-frame. The crossover features refer to the fact that it borrows elements from the design of traditional body-on-frame vehicles with those of the traditional unibody station wagon or hatchback vehicles: e.g. higher sitting position; rear lift-gate design; mono-compartment; independent rear suspension. With essentially all those features, the Grand Cherokee is a very very manly cross-over that is closer to a traditional SUV in looks and functionality but very much car-like in handling and design. Just look up Lexus GX reviews and compare the build and the features of this SUV with the Grand Cherokee. There are fewer elements in the GX (Grand Crossover) that make it a cross-over compared to the GC.
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Old 10-31-2015, 02:55 PM
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Re: Why 5.7 horsepower discrepancy?

The WK2 was designed when Mercedes owned Chrysler. The WK2 and most recent ML share the same bones. No car is based off the platform only SUV's such as the Durango.


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Old 10-31-2015, 03:39 PM
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Re: Why 5.7 horsepower discrepancy?

Quote:
Originally Posted by Raptor View Post
The different HP ratings for the exact same Chrysler 5.7L Hemi's can be attributed to the different intakes and exhaust manifolds on the various Hemi versions. Also note that the engine bays in the Ram trucks offer more room for bigger better flowing exhaust manifolds that lead to higher HP numbers than the tighter Grand Cherokee engine bays will allow. To sum it up.....they make them breath better!
Can't argue intelligently about this, but everyone here who fits aftermarket exhaust and CAI to their GC reports little hp gain, just better sound. So if you're right, RAMs must be making up to 35hp more mostly from a very header-like exhaust manifold design and possibly a more efficient intake manifold. Obviously the GC engine bay is tighter, but there must be some room for improvement.
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Old 10-31-2015, 03:52 PM
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Re: Why 5.7 horsepower discrepancy?

Quote:
Originally Posted by f1anatic View Post
The Grand Cherokee has a unibody construction, as opposed to a body-on-frame. The crossover features refer to the fact that it borrows elements from the design of traditional body-on-frame vehicles with those of the traditional unibody station wagon or hatchback vehicles: e.g. higher sitting position; rear lift-gate design; mono-compartment; independent rear suspension. With essentially all those features, the Grand Cherokee is a very very manly cross-over that is closer to a traditional SUV in looks and functionality but very much car-like in handling and design. Just look up Lexus GX reviews and compare the build and the features of this SUV with the Grand Cherokee. There are fewer elements in the GX (Grand Crossover) that make it a cross-over compared to the GC.
While the term crossover is used somewhat loosely, it most commonly refers to a taller version of a car, as others have stated here, not because it borrows elements from a body-on-frame vehicle. The Subaru Forester is referred to as a crossover, for example, and its only ever been a tall wagon. The GC is the modern evolution of the traditional SUV (unibody) and, as mentioned above, has an impressive German pedigree.
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