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Topic Review (Newest First)
11-29-2012 10:54 PM
GT500 What everyone else said! I would add that you will not see any MPH gains with the 2.5L. I have a 97 2.5L with the 5 speed manual and my friend has an 2004 4.0 LJ with the 6 speed manual. We drive similarly and can spend a day out on the trail together driving all the same places. At the end of the day he always puts less gas in the tank than I do. My 4 banger simply has to work harder to keep up and therefore burns more gas. I often wish I had more power on the highway, or in sand and deep snow, but on the trail it does perform like a champ.

In short, don't buy one thinking you will save gas money.
11-29-2012 08:02 PM
misky The 4.0 - manual or auto w/right axle ratio.

I have the flat-lander axle ratios with my auto and it can't get started
from a light nor maintain speed on hilly roads in Colorado.
11-28-2012 06:20 AM
jimwww 2.5 if you never want to modify it and don't care about power. 4.0L if you want to run bigger tires and feel like it is a small v8 when you accelerate and care about resale value.
11-27-2012 09:58 PM
dixau11 I have a 2.5 with 33" and it's a dog on the interstate... Tops at 70 to the floor in 4 th.. 5th won't push it... You eliminate 4th.. Go with the 6.. I plan on getting a hemi eventually.. Or 4bt cummins
11-27-2012 07:43 PM
TahoeBen
Quote:
Originally Posted by Rooster21

Just picked up a 03 with 4.0.. First thing I did was hit the hill that takes me out of town and I am still smiling.. So glad I listen to everyone on the forum about selling the 2.5 instead of dumping a bunch of money in it.. It is unreal the power of a 4.0 to a 2.5. I new it would be better, but never thought there could be that much difference between the two.. 4.0 is the only way to go..
Welcome back!
11-27-2012 07:21 PM
Rooster21
Quote:
Originally Posted by Rooster21 View Post
I finally pulled the trigger back in March after always wanting a jeep.. Wish I had found this forum sooner.. Anyway, I ran across a 97 2.5 auto with hardtop that was still basically stock. Great condition and looked like it has never to been off road much.. First thing I did was throw some 31s on it and even though it was fine around town, it was a dog on the interstate. I could get up to 80, but would take awhile. Top speed is not the problem, I could cruise around 65-70 with a nice ride. It was getting on the interstate that was a problem or going up steep inclines where you notice being under powered. I even notice on backroads when pulling out somewhere with a slight incline, you better make sure no one is coming. Plenty of times I would pull out thinking had enough time, only to find someone right on my a$$. You do have to alter driving style with a 2.5..This is with a auto, 5 speed might be a little better..

Not wanting to offend anyone, but spend your money on a 4.0... Some will say you can regear after adding larger tires to get back some performance, but that is goin to set you back $1500.00 or so, which is basically the cost difference of a 2.5 an 4.0..

I did find this forum soon enough, before I started adding a bunch of stuff to try and get more power from my 2.5.. Also I did what everyone else said, save your money on Mods that dont really help the 2.5 and sell your 2.5 and find a 4.0.. Between the money I got out of mine and the $2000 or so I saved by not regearing and adding a bunch of bolt on mods that still leave you with a 2.5, I should be able to find a nice 4.0.

I do miss my 2.5, but as soon as I find me a 4.0 I will will not think twice about making the switch.

Just picked up a 03 with 4.0.. First thing I did was hit the hill that takes me out of town and I am still smiling.. So glad I listen to everyone on the forum about selling the 2.5 instead of dumping a bunch of money in it.. It is unreal the power of a 4.0 to a 2.5. I new it would be better, but never thought there could be that much difference between the two.. 4.0 is the only way to go..
11-27-2012 01:42 PM
Helomech
Quote:
Originally Posted by Hardtop View Post
But if you're planning on pulling a boat...
Pulling a boat with a wrangler? I have a hitch, but hadn't really throught about dragging my 21' cutty cabin with the jeep. Hmmmmm...

2000 TJ 4.0, Auto, Hardtop, AC, 33's...
11-21-2012 09:43 AM
Ginsu I have a 98 2.5L auto. It's not thattt bad... I don't complain about getting up to speed or anything. But if you find a huge hill, you'd better prepare for hell. xD
11-21-2012 07:57 AM
MarkGLHS
Quote:
Originally Posted by doclouie View Post
I am yet to hear anyone say they wish they had gotten the 2.5L when they have the 4.0L, but hear a lot the other way around.

you read my mind.

there is just no better engine for the Wrangler than the 4.0L. even today.
11-21-2012 06:31 AM
wmdavis007 To me it was hands down a 4.0L, never even considered the 2.5L. Had to be a TJ...had to be a 4.0L. The cost is a little higher but so is the resale (if you don't plan to keep it until the rapture). No MPG gain, less power and about a grand cheaper...not for me. If it's about money, save a little longer and get a 4.0L, maybe even save more to hold out for a Rubicon or find one with a Dana 44 rear axle. (Don't forget about other options too like a hardtop, full doors, AC, cruise...some people don't think of these when getting a Jeep until they already laid out the cash. But a lot of folks that drive Jeeps don't care and like the minimalistic Jeeps. I just wish mine had cruise for my summer treks to Myrtle Beach.)
11-21-2012 05:28 AM
tallzdatank same price, or less than 20% more? get the 4.0. if its gonna be ridiculous, as many 4.0 jeeps are, get a 2.5. they're good tough never say die engines, unlike the 2.4.
11-21-2012 05:02 AM
Rommelx3 I've driven both and the 2.5L can become exhausting to drive on freeways especially in traffic situations that require you to accelerate quickly.
11-21-2012 01:21 AM
Randens Rubi 4.0 end of discussion.
11-21-2012 01:19 AM
DeJeeps The only reason I would consider less power is if I got +25% better gas mileage. But for one extra mile per gallon, no way. 4.0L
11-21-2012 12:50 AM
TahoeBen I saw one guy's garage on here. Bright yellow with a LS3 dropped in it. If you can't do that, then 4.0. That's one of the first things anybody that knows Jeeps will ask, be proud of your answer
11-20-2012 11:46 PM
Jeepn Again I've come to realize its not a matter of preference of engine or power. Every single person on here would prefer the 4.0 over the 2.5 or 2.4 including myself. The real difference is budget! They both end up getting close to the same gas mileage so that really has no bearing on purchasing decisions. Seems like there's generally a premium of $1000-2000 for the 4.0. That's a lot of extra money to some people when purchasing.
Good luck with the purchase!
11-20-2012 10:35 PM
NalinMFG If given the choice, it's hardly a debate -- 4.0 all the way.
11-20-2012 10:28 PM
03 TJX If you're going to get a 4 cylinder get the good one, the 2.4 from 2003 to 2006, very good engine. And if you're going to be picky about it get the good transmission - the 5 speed from 2003 to 2004. Six speeds is gear clutter on both the 2.4 and 4.0.
11-20-2012 10:03 PM
Plowboy1970 4.0
11-20-2012 09:40 PM
doclouie I am yet to hear anyone say they wish they had gotten the 2.5L when they have the 4.0L, but hear a lot the other way around.
11-20-2012 08:17 PM
89quest I have a 89 2.5L TBI 5/spd with 33x12.50x15 tires. If you are not going to do anything but stock, go with the 6 cylinder.I wish I had found this forum before I bought.To get up a long not to steep incline I have to baet the tar out of my little baby in third gear to maintain 40 mph+.Now my options are regearing and the costs are not in MY budget anytime soon.Do yourself a favor and just get the six, you will be much happier.Oh by the way gas mileage SUCKS when you have to drive anything hard, to maintain highway speed.
11-20-2012 07:51 PM
MOTJ
Quote:
Originally Posted by Gov875 View Post
Thanks for the input everyone! Sounds like a 6 is really the way to go since i still do a fair bit of highway driving. Now to find one with sub-100k miles...
If you find a 2.4 four cylinder 6 speed I have no problems on the highway with my 2.4.
When I decided to buy my first Jeep I shopped for a four cylinder manual.
I wanted the best mileage I could get from a Jeep Wrangler and I heard to many nightmare stories about 13/15 MPG with the six.
The more I read threads like this Iím glad I found a 2.4 six speed .
Now when I have to change the timing belt I might be sorry.
11-20-2012 07:17 PM
mrobinso
Quote:
Originally Posted by Rooster21 View Post
I finally pulled the trigger back in March after always wanting a jeep.. Wish I had found this forum sooner.. Anyway, I ran across a 97 2.5 auto with hardtop that was still basically stock. Great condition and looked like it has never to been off road much.. First thing I did was throw some 31s on it and even though it was fine around town, it was a dog on the interstate. I could get up to 80, but would take awhile. Top speed is not the problem, I could cruise around 65-70 with a nice ride. It was getting on the interstate that was a problem or going up steep inclines where you notice being under powered. I even notice on backroads when pulling out somewhere with a slight incline, you better make sure no one is coming. Plenty of times I would pull out thinking had enough time, only to find someone right on my a$$. You do have to alter driving style with a 2.5..This is with a auto, 5 speed might be a little better..

Not wanting to offend anyone, but spend your money on a 4.0... Some will say you can regear after adding larger tires to get back some performance, but that is goin to set you back $1500.00 or so, which is basically the cost difference of a 2.5 an 4.0..

I did find this forum soon enough, before I started adding a bunch of stuff to try and get more power from my 2.5.. Also I did what everyone else said, save your money on Mods that dont really help the 2.5 and sell your 2.5 and find a 4.0.. Between the money I got out of mine and the $2000 or so I saved by not regearing and adding a bunch of bolt on mods that still leave you with a 2.5, I should be able to find a nice 4.0.

I do miss my 2.5, but as soon as I find me a 4.0 I will will not think twice about making the switch.
This does a good job of explaining it. I wince every time I get passed by some old jalopy or truck. I don't really drive it on the interstate, but I don't look forward to that experience.
11-20-2012 06:55 PM
Bucktaker i just went threw the decision process and passed on a 98 2.5 se no options half doors that was actually in slightly better overall condition but opted for a 99 4.0 sport with dual tops and full doors sound bar tilt cruise newer bfg tires and it was less money.

The 2.5 just flat disapointed me on the test drives so i knew I would never be happy with it.
11-20-2012 06:25 PM
Southerner I Have a lil' old 2.5. Ive taken it down the highway. Was is a race car? No. Did it get me where I was going? Yes. Most of my driving doesn't get over 40mph so for me the 2.5 works fine.
11-20-2012 06:22 PM
oIIIIIIo I would go with rt he 4.0, trust me you will need it.
11-20-2012 06:16 PM
Hardtop My '97 is a 2.5 rolling on 31's. It hasn't got much pick-up, but I can keep up with highway traffic without having to work the engine any harder than any other car or truck out there. Off-road, it performs as you'd expect from a Jeep. The toughest thing I've gone through are muddy trails and deep ruts. It's my daily driver, so I don't have it lifted or heavily modified.

Now, the 4.0 is an I-6, which is the most efficient design possible for maximizing your torque output. In fact, all Class A trucks have I-6 engines because no other design can beat it. Do you need a 4.0 Jeep on the highway? Not by itself, no. But if you're planning on pulling a boat, rock-crawling or mud bogging regularly, the 4.0 will be the better choice.
11-20-2012 06:07 PM
Ibuildembig Nah 2.5s are good to sell someone who has a blown one but that's it.
11-20-2012 06:03 PM
Dextreme
Quote:
Originally Posted by sinbob View Post
the 2.5 besides being underpowered will not last 1/3 as long as the 4.0....that motor is almost bullit proof.....
I respectfully disagree. The 2.5L is actually known to run equal or higher miles than the 4.0L....but regardless, much of it has to do with the abuse they are put through. I would never buy a 2.5L or a 4.0L that my certain buddy has owned.
11-20-2012 05:39 PM
swampbuggy98 I've got a 98 with 125k on her with a 2.5 and she gets it down the interstate with no problems and with the 4.11's in the back she'll crawl out of anything in 4L without lookin twice.
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