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Old 11-24-2010, 08:48 AM   #1
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2.5 vs. 4.0

I'm currently shopping for a TJ and trying to stay around $10K or less. I seem to keep finding that most have the 2.5 I-4 in that price range. Help me out here and let me know your opinion on each engine.

Thanks.

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Old 11-24-2010, 08:55 AM   #2
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What are your plans with the Jeep? You going to put big tires and wheel it a bunch or mainly a DD?

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Old 11-24-2010, 08:57 AM   #3
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2.5 pros small light easier to swap out in case of any problems good out gas

cons turd turd and with an intake it will make your jeep sounds like a honda civic

4.0 pros running mo'fo sounds great last for ever pretty simple

cons not so good on gas rear main seal and valve cover gasket go alot on older motors

which ever way you go they are both good motors a buddy of mine had a yj with 36's axels drive shaft transfer case and tranny are all from a 6 and he threw a 4 banger in there and breaks nothing =)) best of luck
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Old 11-24-2010, 09:33 AM   #4
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I would say go for the 4.0 it's a great engine I have 305,000 miles on mine never been to tha shop for any engine wrk and still runs pretty strong.
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Old 11-24-2010, 09:46 AM   #5
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What are your plans with the Jeep? You going to put big tires and wheel it a bunch or mainly a DD?
I'd like to have a small lift and larger tires. It would primarily be a DD, but would like to wheel it occasionally.
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Old 11-24-2010, 10:04 AM   #6
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the 6 cylinder is a very bullet proof motor. The 4 banger isn't bad either, but people abuse the crap out of the 6 and it keeps running. Aside from the terrible gas milage (12-13 mpg with 33" tires) I love mine.
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Old 11-24-2010, 10:08 AM   #7
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i have a 2.5 and love it..... would love a 4.0 more..... the 2.5 is great for its size, its simple, reliable and easy to work on..... it also mannages to tug my tin can of a boat and my small utility trailer.... its slow as molasis and not great on gas (not that the 4.0 is but at least its not guttless)

for the love of god get it with a stick no matter what engine!
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Old 11-24-2010, 11:15 AM   #8
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the 6 cylinder is a very bullet proof motor. The 4 banger isn't bad either, but people abuse the crap out of the 6 and it keeps running. Aside from the terrible gas milage (12-13 mpg with 33" tires) I love mine.
I'm getting 18 mpg in my 97 4Runner now, so I'm used to so-so gas mileage. Did you re-gear with the 33s?

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i have a 2.5 and love it..... would love a 4.0 more..... the 2.5 is great for its size, its simple, reliable and easy to work on..... it also mannages to tug my tin can of a boat and my small utility trailer.... its slow as molasis and not great on gas (not that the 4.0 is but at least its not guttless)

for the love of god get it with a stick no matter what engine!
I was wondering if the 2.5 would be underpowered. So it is much better to get the stick over the auto? Do the automatics have issues?
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Old 11-24-2010, 11:22 AM   #9
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Definitely the 4.0- the added power is
Needed and resale is much better.
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Old 11-24-2010, 11:45 AM   #10
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for the love of god get it with a stick no matter what engine!
, I agree

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So it is much better to get the stick over the auto? Do the automatics have issues?
No, it's strictly a personal preference thing.

As far as shopping for TJ's, you'll find more 4 bangers for sale than sixes, and they'll be cheaper. The reason for that is most people prefer the six. It has many advantages.
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Old 11-24-2010, 12:08 PM   #11
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the 4 is worth way more and it will do more but there is nothing wrong with the 2.5 it gets the job done and although mine is a but gutless it is still an asome ride. stick helps compinsate a bit and is WAY cheaper and easier to service...... plus its just more fun..... get what you are comfortable with... be patient and find a good jeep that is right for you.... and GET A STICK SHIFT!!!
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Old 11-24-2010, 12:26 PM   #12
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As far as shopping for TJ's, you'll find more 4 bangers for sale than sixes, and they'll be cheaper. The reason for that is most people prefer the six. It has many advantages.
That's exactly what I've been finding. It figures I would want the more expensive option...the 4.0.
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Old 11-24-2010, 12:40 PM   #13
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That's exactly what I've been finding. It figures I would want the more expensive option...the 4.0.
For your 10k budget, you should be able to find a real nice 4.0 TJ. Look for one with less than around 130,000 miles on it. Find a stock one, less likely to have problems. In that price range you'll probably be looking at '99 to '02's. Hold out for the 4.0. Good luck
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Old 11-24-2010, 12:40 PM   #14
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dont forget to check the axles.
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Old 11-24-2010, 12:44 PM   #15
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My vote is 4.0
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Old 11-24-2010, 01:06 PM   #16
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2.5 is ok, but the lack of torque can sometimes a bit slow especially when you driving at high speed a small hill or head wind can slow you down even you floor it.
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Old 11-24-2010, 01:11 PM   #17
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I got a good deal on a 2.5l 5 speed, and it has more than enough power for me. When I want the wind in my hair I can get it going 70mph before merging on the freeway. When I want gas in the tank, I take it easy and average 20mpg. With that said a little more power is never a bad thing. Take a test drive and see what you think!
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Old 11-24-2010, 01:42 PM   #18
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For your 10k budget, you should be able to find a real nice 4.0 TJ. Look for one with less than around 130,000 miles on it. Find a stock one, less likely to have problems. In that price range you'll probably be looking at '99 to '02's. Hold out for the 4.0. Good luck
Thanks, pokey! The mileage was another issue too....wondering how much was too much. I've heard from a few that a well cared for TJ should be good for 300K, maybe more.

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dont forget to check the axles.
Yes! I've learned to look for the Dana 44 rear. I know the newer X came with the Dana 35. Did the Sport come with it too?
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Old 11-24-2010, 01:49 PM   #19
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[QUOTE=pumpkinracer;892150]I'm getting 18 mpg in my 97 4Runner now, so I'm used to so-so gas mileage. Did you re-gear with the 33s?

Depending on the what gear ratio you get and what engine will determine if you need to regear. I have the 4.0 with 3.07 gears (fairly standard) and am running 33's. It's not ideal but it works. But the gears really bug me when off roading because it is not geared low enough when crawling through more difficult trails. So I plan on going to 4.56 gears next year. Good luck and if you can find a good deal I suggest going with the 4.0. I got my 04 w/ about 80K miles on it last winter for around $11K so keep looking, the deals are out there.
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Old 11-24-2010, 01:49 PM   #20
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Thanks, pokey! The mileage was another issue too....wondering how much was too much. I've heard from a few that a well cared for TJ should be good for 300K, maybe more.
how much is too much depending on the previous owner really.
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Old 11-24-2010, 02:41 PM   #21
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Man, for 10k you should be in good shape. I got a stock 97 4.0 with 105000 miles for $3900. If I had an extra $6100 my baby would be kick-ass.
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Old 11-24-2010, 04:12 PM   #22
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That is something I thought about when looking for my Jeep. Read many reviews on both and everyone love there Jeep 4 or 6 it didn't really matter. Some did want more power running the 4 but it had allot to do with there set up. I test drove several Jeeps in the months I was searching for the right one for me. I could definitely tell the 4 had less power during acceleration but not so much at hwy speeds. I bought the 6 for the extra power and durability, not to say the 4 is not durable. I just came from straight 6 ford maybe thats what sold me on the 6. I would go with the six but you will be happy with either.
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Old 11-25-2010, 11:58 AM   #23
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^well said.... no matter what u will love it.... just dont spend more for a 4.0 expecting it to be fast.... its got more power but still maxes out just faster brisk walking speed on the highway....

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