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Old 03-25-2015, 06:32 PM
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Ecodiesel vs Hemi Towing

This is a ram comparison but the power trains are the same minus the hemi vs the ecodiesel. Both were towing roughly 7200lbs.

7:50 For the Hemi Up the Ike Gauntlet



9:03 For the Ecodiesel up the Ike Gauntlet



Looks like you ecodiesel boys need to step your game up. HEMI POWER!!!

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Old 03-25-2015, 10:50 PM
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Re: Ecodiesel vs Hemi Towing

The GC one has been posted several times before.

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Old 03-25-2015, 11:39 PM
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Re: Ecodiesel vs Hemi Towing

Definitely an "around town towing machine"
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Old 03-26-2015, 12:36 AM
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Re: Ecodiesel vs Hemi Towing

Quote:
Originally Posted by CIEGOS View Post
This is a ram comparison but the power trains are the same minus the hemi vs the ecodiesel. Both were towing roughly 7200lbs.

7:50 For the Hemi Up the Ike Gauntlet



9:03 For the Ecodiesel up the Ike Gauntlet



Looks like you ecodiesel boys need to step your game up. HEMI POWER!!!

Size isn't everything.
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Old 03-26-2015, 01:28 AM
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Re: Ecodiesel vs Hemi Towing

I can't imagine why anyone would be surprised, and perhaps feel justified to boast, that a truck with an engine almost double in displacement and with about 155 additional horsepower over the 3.0 EcoDiesel would haul a load up a mountain faster.

In terms of efficiency, considering the amount of gas the Hemi sucks down to feed that big engine and thus make 155 more horses, I say EcoDiesel FTW!

Looks like you hemi boys need to step up your efficiency game. DIESEL EFFICIENCY!!!
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Old 03-26-2015, 07:24 AM
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Re: Ecodiesel vs Hemi Towing

What I found most interesting was the ecodiesel Jeep finished the run at 15.3 mpg vs. the ecodiesel Ram at 6.1 mpg. I find it hard to believe that the same engine/drivetrain would perform so much differently in the 2 vehicles. It makes me wonder about the weight/front area difference between the trailers that are being towed in the test.
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Old 03-26-2015, 07:37 AM
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Re: Ecodiesel vs Hemi Towing

Quote:
Originally Posted by CJ8Rockcrawler View Post
What I found most interesting was the ecodiesel Jeep finished the run at 15.3 mpg vs. the ecodiesel Ram at 6.1 mpg. I find it hard to believe that the same engine/drivetrain would perform so much differently in the 2 vehicles. It makes me wonder about the weight/front area difference between the trailers that are being towed in the test.
Heavier load with the truck in the video wasn't it (thought I heard 7200 for truck and somewhere in the 5000's for the boat)? Wonder if the gear ratio also played a factor.
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Old 03-26-2015, 07:44 AM
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The jeep run included the downhill mpg. The ram was only uphill mpg.
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Old 03-26-2015, 08:28 AM
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The hemi was the better choice on that tow test, it was faster and more fuel efficent. The diesel had 6.1 mpg and the hemi was 7.3 mpg. Likely because the diesel couldnt maintain the speed of 60 mph they selected dropping down to 50 mph and they had to keep it floored the whole time. The hemi they could not keep it floored or it would have overshoot the 60 mph limit they selected, so they were not wide open the whole time. Also factor in the higher cost of diesel fuel.

Interesting up hill test would have liked to see another test with them continue up and down in high mountain territory with those loads over more miles.
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Old 03-27-2015, 08:21 AM
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Re: Ecodiesel vs Hemi Towing

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Originally Posted by silvermax04 View Post
The hemi was the better choice on that tow test, it was faster and more fuel efficent. The diesel had 6.1 mpg and the hemi was 7.3 mpg.
Those results are irrelevant. There are too many variables: different day, different weights and you cannot rely on on-board computer MPG figures. Especially under maximum demand they will be all over the place.

It's physically impossible for a hemi with almost twice the displacement, running 2000 RPM more on average and getting up the hill quicker due to it's higher peak HP to use less fuel than the diesel. Not to mention the same engine in the JGC test with a little less tow weight got over 15 MPG. I hardly think a few extra thousand pounds and the engine being in a different vehicle of similar weight will change MPG by a factor of 255%.

In an actual A-B test the same day, the same trailer and a real mechanical fuel use computation the diesel will come out far more efficient.
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Old 03-27-2015, 09:26 AM
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Quote:
Originally Posted by Zybane View Post

Those results are irrelevant. There are too many variables: different day, different weights and you cannot rely on on-board computer MPG figures. Especially under maximum demand they will be all over the place.

It's physically impossible for a hemi with almost twice the displacement, running 2000 RPM more on average and getting up the hill quicker due to it's higher peak HP to use less fuel than the diesel. Not to mention the same engine in the JGC test with a little less tow weight got over 15 MPG. I hardly think a few extra thousand pounds and the engine being in a different vehicle of similar weight will change MPG by a factor of 255%.

In an actual A-B test the same day, the same trailer and a real mechanical fuel use computation the diesel will come out far more efficient.
I agree that was not a scientific test but it was similar and im only going by the numbers they produced. It was also mentioned in an above post that the Grand cherokee run with 15mpg also included the downhill which the two above did not so the 15 mpg is not a comparison in that uphill only test. These were extreme tests would be cool to see them do some like this with the GCs and like i said above be good to see them over a longer course up and down highly mountainous terrain.
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Old 03-27-2015, 09:41 AM
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Re: Ecodiesel vs Hemi Towing

Not REALLY a real world test.......!
Ask a JGC Diesel owner that REGULARLY tows what sort of mileage they get.
We tow a 5000lb travel trailer and regularly see just under 15mpg in "mixed" driving...that is a combination of trailering with the cruise set at 65mph going up hill and down hill over the course of 1300 miles!

I've checked the veracity of the figures by filling up and computing the mileage by hand. And it is quite close to the figures on the EVIC....

Of course, being a diesel and all, we see 30+ mpg at 70+ mph when not towing!
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