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  #37  
Old 03-18-2015, 08:01 PM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by lstowell View Post
You really need to drive both on roads representative of where you will be driving.
Get similarly equipped models and when testing don't worry about 4x4 vs 4x2 as long as both are the same.

The difference in consumption between the hemi and v6 is largely determined by where you drive and how heavy and steady a right foot you have. The hemi recommends mid-grade vs regular or bushgas for the v6 if that is a consideration.

The V6 is fairly spritely, particularly for such a heavy vehicle--aided largely by the 8 speed. The hemi is notably more spritely if you live at higher altitude or drive where the altitude changes a lot--no way can either the turbodiesel or v6 stay close to a hemi, and the 8 speed in the hemi really helps with mileage unless you have a nervous foot--plus it is a different model 8 speed straight from ZF.

The hemi is not a Daddy Don Garlits grade engine--more like an older reasonably fast 327/350 or modest 396. It does have torque--not as much as the diesel, but has a pretty wide power band.

The V6 is kinda like your mother-in-law on too much coffee. A rather imposing force, but at the cost of possibly a bit too much noise and drama. The hemi is the big gentle retired football center next door--an even more imposing force and incredibly relaxed while putting miles and lesser traffice behind it at very impressive rates.
lol well put. It is all in how and where you drive them. IMO 3 mpg combined EPA is not a huge mileage difference between the v8 and v6 but that is a matter of opinion, the v6 will of course get you better mileage how much better is up to you. The v8 did give better mileage than I expected on highway only cruising where the MDS comes on and stay on for a lot of your trip and you can do significantly better than the rated 20, combined mileage has been 17 or 18 for me. If you do city only driving the v8 is not going to do well that is where any v8 is going to suffer the most.

There was a Car and Driver article on the 2014 where they road tested the v8 and the v6 and the average mileage they produced was 17 for the v6 and 16 for the v8 and the reason they gave for that was that the v6 had to work a lot harder to push around a heavy SUV. someone else could do a test and come up with different results because it really is all in how you drive them. If you are a conservative driver im sure you will be able to produce some very good mileage on the v6 but buying a v6 is not a cure for a lead foot, you probably will end up with similar numbers to Car and Driver.

Basically if you want a little better mileage buy the v6 if you want a little faster buy the v8 but also consider how you will be driving them. v6 makes sense for some v8 makes sense for others there is no right or wrong answer.

Here is that car and driver article, its for the 2014 but its the same engine/trans for 2015. its a good read if you are buying

"Although most V-8 buyers likely won’t list fuel economy as the prime reason for purchase, the Hemi V-8 is fitted with an unobtrusive cylinder-deactivation program to help curb thirst. Even so, the eight-pot Grand Cherokee’s EPA estimates come in at a modest 14 mpg city and 20 highway, which are a significant 3 and 4 mpg lower than the V-6’s. In the real world, however, the gap narrows considerably. We logged 16 with the V-8 versus 17 with the V-6. Chalk it up to the fact that the V-6 must work much harder to move two-and-a-half tons of Jeep."

http://www.caranddriver.com/reviews/2014-jeep-grand-cherokee-hemi-v-8-test-review

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  #38  
Old 03-18-2015, 09:04 PM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by 14OverNY View Post
I'm trying to figure out why you need the v8 beyond fun factor.

Personally, I think you are crazy getting 2WD! That vehicle will be a miserable trade/resale down the road IMHO, and will lack the qualities the Jeep was really built to showcase. But hey, to each their own.
Why should I buy a 4WD that I'm never going to need or use? I've already stated the thing will never leave the pavement, or see snow. I could care less about "resale value". I'm still driving my last 2 new cars I bought 24 years ago. I'll most likely drive this one until the wheels fall off, or I'm dead.

4WD gives less fuel economy. It costs more to buy. It has more parts to wear out and fail, and is more costly to repair. Why would I want that? Especially if I'm never going to need it. As far as the V-8. I'll appreciate and use the power it provides every time I drive it.
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  #39  
Old 03-18-2015, 10:15 PM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

I visited Arizona once. People were sad about a sprinkle. It was barely sprinkling, and people were complaining about "the rain." Very different perspective then where I come from, where rain is considered a blessing most of the time (crops and livestock). If it isn't more than an inch, we complain about the lack of rain.

4x4 is not a necessity down there 99.9% of the time. I saw that first hand. If you don't want it, don't buy it. Just don't visit the northern half of the continental USA, unless you are doing it in June/July.

As for V8 vs V6, as others have said, its subjective. I won't knock the V6 too badly; with the 8-speed, its definitely more than adequate. However, if gas mileage isn't a concern, the Hemi is fantastic.

Odds are you will have no issues with new 8-speed transmission. However, with that being said, the V6's 8-speed has known to be more problematic than the V8. That may be just because the V6 far outsells the V8, but you do see more of them reported. It is my belief that one reason for that is that the Hemi and diesel transmissions are made by ZF themselves, and are the same as the ones they put into many higher end vehicles (BMW 7 series, BMW X5, Rolls-Royce Phantom). The V6 transmission is a ZF design that Chrysler modifies ("beefs up") and then builds in a Chrysler plant.
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  #40  
Old 03-18-2015, 10:45 PM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

I don't know if this helps but I traded in a v8 supercharged Range Rover sport with (390hp) for a 14 ecodiesel and I couldn't complain, I thought it was the best compromise between the power mpg, I noticed as I get older I don't really drive super fast on the highway anymore, just speed up for passing at times, most of the times I floor it is at lower speeds and the torque of the diesel is good for that. Before the range I had a coyote mustang hardtop and while I'm used to faster cars I been digging the ecodiesel since I got it.
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  #41  
Old 03-18-2015, 11:01 PM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by billt View Post
Why should I buy a 4WD that I'm never going to need or use? I've already stated the thing will never leave the pavement, or see snow. I could care less about "resale value". I'm still driving my last 2 new cars I bought 24 years ago. I'll most likely drive this one until the wheels fall off, or I'm dead.

4WD gives less fuel economy. It costs more to buy. It has more parts to wear out and fail, and is more costly to repair. Why would I want that? Especially if I'm never going to need it. As far as the V-8. I'll appreciate and use the power it provides every time I drive it.


If there was not a market for 2WD Jeeps, they wouldn't still be making them. To some (me included) a vehicle is a tool. To many, it is an extension of their being.

Buy what you need, not what others think you should have.


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  #42  
Old 03-18-2015, 11:21 PM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by billt View Post
Very well put! The more replies I read, the more it looks like I'll be getting a HEMI.
Put your behind in the seats of both cars and test for yourself. You are the only one that needs satisfying with your decision. Remember the V6 has more HP than a lot of V8s from the 60's and 70's.

Paul
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  #43  
Old 03-19-2015, 12:56 AM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by 14OverNY View Post
I'm trying to figure out why you need the v8 beyond fun factor.
The V8 is for Hauling. Hauling A$$ that is!

Personally, I never go for the small engine with any vehicle, especially an SUV. If fuel efficiency is very high on your list, maybe you should go buy a Prius, or a Leaf, or a Volt.

Hell... if the 6.4L Hemi from the SRT was an option in any Off Road capable version...

But maybe that's just me. I don't go for any of the Politically Correct new age crap being spewed these days. And my foot is literally made of lead.
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  #44  
Old 03-19-2015, 04:40 AM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by billt View Post
How has the 8-Speed transmission performed for you guys? Good reliability and performance? I can't imagine the complexity of so many speeds. How do the paddle shifters work in "S" Mode? If you select "D", does it work like a normal automatic? They seem to be pretty reliable from what I've read. If you just cruise along in "D", how fast of a speed does it require before you get into 8th gear?
I only have about 250 miles on so far but I love the Hemi. In D it will be in 8th gear by the time you hit 45 or so. This can be annoying but can be mitigated by turning Eco mode off and it will stay in lower gear longer. Sport mode is awesome but really sucks up the gas. For me the "S" is for Saturday and Sunday only. I drive only city and average 13-15 in D but will be around 10-12 in S mode. Paddle shift mode will still shift for you it will just rev much higher in D and will go all the way to red line in S. I only tried paddle mode briefly because it seemed like too much engine braking when I downshifted, will certainly test it more though.

Between paddle on/off, eco on/off, D/S, I feel like I haven't even scratched the surface of what the vehicle can do at this point but it is so much fun to drive and has so much power available.

I ordered the Hemi for the same reason you mentioned: lack of availability. Took 5.5 weeks and I got exactly what I wanted. If fuel mileage was a concern I would stay away from Hemi because it's impossible to keep your foot off the gas. Since you stated that it wasn't a concern for you then I think its an easy choice.
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  #45  
Old 03-19-2015, 07:59 AM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by chjohnso21 View Post
I only have about 250 miles on so far but I love the Hemi. In D it will be in 8th gear by the time you hit 45 or so. This can be annoying but can be mitigated by turning Eco mode off and it will stay in lower gear longer. Sport mode is awesome but really sucks up the gas. For me the "S" is for Saturday and Sunday only. I drive only city and average 13-15 in D but will be around 10-12 in S mode. Paddle shift mode will still shift for you it will just rev much higher in D and will go all the way to red line in S. I only tried paddle mode briefly because it seemed like too much engine braking when I downshifted, will certainly test it more though.

Between paddle on/off, eco on/off, D/S, I feel like I haven't even scratched the surface of what the vehicle can do at this point but it is so much fun to drive and has so much power available.

I ordered the Hemi for the same reason you mentioned: lack of availability. Took 5.5 weeks and I got exactly what I wanted. If fuel mileage was a concern I would stay away from Hemi because it's impossible to keep your foot off the gas. Since you stated that it wasn't a concern for you then I think its an easy choice.
With only 250 miles under your belt, how did you determine that Sport mode sucks up the gas? Many have found little difference when leaving it in Sport all the time.

Of course if every time you put it in Sport you go balls to the wall, that will make a difference.


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  #46  
Old 03-19-2015, 08:09 AM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

For those of you considering a HEMI simply because it's faster you should reconsider.

That feeling of mass didn't hold the Pentastar-powered Grand Cherokee back at the track, though. Its 0-60 time was 7.7 seconds, and it ran the quarter mile in 15.8 seconds at 88.4 mph. Braking was quite good; the Jeep needed only 118 feet to stop from 60 mph.

The Hemi got the 5245-pound Jeep to 60 in 6.6 seconds and through the quarter in 14.9 seconds at 92.8 mph. But this Grand Cherokee needed 132 feet to stop from 60.

Less than a second better in quarter is nothing to write home about.
Not to mention the longer stopping distance because of the additional weight.
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  #47  
Old 03-19-2015, 08:27 AM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by chjohnso21 View Post
I only have about 250 miles on so far but I love the Hemi. In D it will be in 8th gear by the time you hit 45 or so.
In 8th on the freeway at say 65 MPH, how many revs is it turning?
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  #48  
Old 03-19-2015, 08:31 AM
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Re: 2015 Grand Cherokee - V-8 Or V-6 ??

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Originally Posted by MOFSTEEL View Post
For those of you considering a HEMI simply because it's faster you should reconsider.

That feeling of mass didn't hold the Pentastar-powered Grand Cherokee back at the track, though. Its 0-60 time was 7.7 seconds, and it ran the quarter mile in 15.8 seconds at 88.4 mph. Braking was quite good; the Jeep needed only 118 feet to stop from 60 mph.
The Hemi got the 5245-pound Jeep to 60 in 6.6 seconds and through the quarter in 14.9 seconds at 92.8 mph. But this Grand Cherokee needed 132 feet to stop from 60.

Less than a second better in quarter is nothing to write home about.
Not to mention the longer stopping distance because of the additional weight.
Actually a second faster 0-60, and almost a full second faster in the 1/4 mile is a pretty impressive boost. Especially when you consider the weight of the Grand Cherokee. Also, it's not the most aerodynamically efficient vehicle on the road.
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