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Old 08-17-2015, 09:17 PM
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V8 (4.7L) vs V6 Pentastar

Not quite the same V8 vs V6 thread. I'm curious on peoples thoughts on the original 4.7L V8 (ie 2000 WJ) versus the new Pentastar V6. Reason being of course, I have a 2000 WJ with the 4.7 and am comparing different powertrain options.

Seat of the pants seems like the Pentastar with the new transmission is at least as quick as the original V8. Towing capacity just a little bit less I believe. Keep going back and forth between the V6, Hemi, and even the diesel. Though the diesel is kind of in last place as I don't really have anything to tow right now.

Thoughts??

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Old 08-17-2015, 09:23 PM
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Re: V8 (4.7L) vs V6 Pentastar

I had the 4.7L in my 02. The 3.6L in my 14 feels just as powerful as far as acceleration goes... maybe even a little more. That kind of surprised me as the 14 is larger and heavier than the 02. The 3.6L's running combined average has been around 20 mpg while the 4.7L's combined average was 16.5-17 mpg.

I was a little worried about going to the 3.6L as I've always had V8's in my GC's. I have no regrets in getting the V6.
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Old 08-17-2015, 09:40 PM
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Re: V8 (4.7L) vs V6 Pentastar

interesting. That's kind of what my seat of the pants was telling me. I've also towed a heavy (Uhaul) car trailer with a 3,000 lb car on it with the WJ from San Diego to Colorado Springs. It did ok except for some sway above 60 mph and the tongue weight was a bit much.

Am I off to say the WK2 with V6 and tow package may actually do better?
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Old 08-17-2015, 09:44 PM
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Re: V8 (4.7L) vs V6 Pentastar

I couldn't tell you as I don't tow. Based on the tow ratings for the GC with a 3.6L I'd have to imagine it would be okay. Others on the forum would probably tell you to go V8 or the diesel if you plan to tow frequently.
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Old 08-17-2015, 09:47 PM
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Re: V8 (4.7L) vs V6 Pentastar

the Pentastar STOMPS the WJ in every aspect.

The pentastar i had easily brought the wk2 to over 100mph.

the WJ 4.7 SUCKS but the the wk2 is about 500lbs heavier than a Wj.

the 4.7 can't compete with the 3.6.

this is like the old 5.9 vs 4.7ho debate.
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Old 08-17-2015, 10:25 PM
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Re: V8 (4.7L) vs V6 Pentastar

Well, not really looking to debate it, just some opinion and to confirm what I suspected through my test drives.

And..... agreed if I knew I would be towing a lot, the Hemi or diesel would be it. But, don't have anything now and most likely it wouldn't be anything too large in the future.

Thanks!

Now just to determine if the transmission gremlins have been solved.
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Old 08-17-2015, 11:14 PM
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Re: V8 (4.7L) vs V6 Pentastar

I still have my 99 WJ with the 4.7L and tow package. I believe it's tow rating is 6800 lbs. I've towed plenty of camper trailers, Uhauls and flatbed car haulers with it prior to the purchase of my 08 V8 Pathfinder in 2011 and now my 2015 Grand Cherokee EcoDiesel. My WJ was a work horse and did everything I asked of it and more. It's towed great even with the lift. I don't know about the V6 now, but I'm assuming its a very capable engine. Just don't put the 4.7L to pasture just yet. It's very capable and efficient.


My 99 WJ with 4.7L, RCX 4inch lift, hitch mounted tire carrier towing a rental camper.



08 V8 Pathfinder with warn 800lb winch and OEM brush guard, rear air bags towing a 2015 Jayco 28BHS



My 2015 Overland EcoDiesel with ORAII towing my 2015 Jayco 28BHS.
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Old 08-17-2015, 11:28 PM
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Re: V8 (4.7L) vs V6 Pentastar

I have the second generation 4.7 V8 in my 2010 Dakota. In the 2008 model year, they switched from the first generation 4.7 to a newer 4.7 that puts out just over 300 HP and 330 lb-ft of torque. It has dual spark plugs per cylinder (like the Hemi), a different camshaft, intake manifold, and throttle body compared to the

I'd say the second generation is on par with the 3.6, as my Dakota is roughly the same weight as the WK2s. The first generation, no, not as powerful. Not a bad engine, but the 3.6 in the Jeeps seems to have more power than the 1st generation and better gas mileage than the 1st or 2nd generation 4.7s.
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Old 08-17-2015, 11:45 PM
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Re: V8 (4.7L) vs V6 Pentastar

Thanks for the comparison. That;s some real world comparison on the towing Volvite. The WJ is not quite out to pasture, but at 221000 miles it's not quite the vehicle of choice if I were to take a cross country trip. Though it's the suspension that needs some TLC these days.

Wasn't aware the later 4.7 had increased power by that much. Original 4.7 was 235 hp, 295 tq.

Pentastar - 290 hp, 260 tq.
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Old 08-18-2015, 12:00 AM
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Re: V8 (4.7L) vs V6 Pentastar

Quote:
Originally Posted by Mogul View Post
Not quite the same V8 vs V6 thread. I'm curious on peoples thoughts on the original 4.7L V8 (ie 2000 WJ) versus the new Pentastar V6. Reason being of course, I have a 2000 WJ with the 4.7 and am comparing different powertrain options.

Seat of the pants seems like the Pentastar with the new transmission is at least as quick as the original V8. Towing capacity just a little bit less I believe. Keep going back and forth between the V6, Hemi, and even the diesel. Though the diesel is kind of in last place as I don't really have anything to tow right now.

Thoughts??
I have an old 1999 JGC Limited WJ with the 4.7 and I just bought a 2015 Summit V6 3 1/2 weeks ago.

The old 4.7 is a very capable engine and it would get up and move pretty good, but it sounded like it was working pretty hard to do it. It has decent pickup but never really had that pin you in the seat feel IMO.

The new WK2 I have with the Pentastar is a rocket. This thing is quicker off the line before I drop it into Sport mode, then once I hit Sport it's just amazing. Considering the WK2 is heavier than the WJ, and it has a V6 over the old V8 it's impressive to me how quick it is.

I drove the Hemi along with the V6 when I was shopping, and while fun I wouldn't get the Hemi unless you are towing; same for the diesel. The cost upgrades are just too much in my book but if I had the need for the torque I would seriously consider it. I don't really plan on towing with my V6 but I'm sure it would do pretty well.
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Old 08-20-2015, 12:14 AM
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Re: V8 (4.7L) vs V6 Pentastar

Thanks. That helps a lot in my decision.
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Old 08-20-2015, 08:53 AM
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Re: V8 (4.7L) vs V6 Pentastar

99-04 wj Limited QD 4.7 3.73 5spd 545RFE Car and driver

0-60 7.2
1/4 15.6 @86

16/19 mpg 4000 lbs


14 WK2 5.7 8spd overland car and driver

0-60 6.5
1/4 15.0 @93

14/20 5324 lbs


14 WK2 3.6 8spd overland car and driver

0-60 7.5
1/4 15.7 @90

17/24 4987 lbs


Wj with the 4.7 is a tad quicker than a 3.6 WK2
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