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Thread: 2.5L 4Cyl. or 4.0L 6Cyl.? Reply to Thread
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Topic Review (Newest First)
12-17-2009 06:24 AM
mruff5 I've had three Jeeps and they have all had the 2.5 4cyl. and after I buy them I always wish I would have gotten the 6... The 4 cyl's have always been reliable for me but are gutless. They work fine once you wind them up but have to bottom end power. As far as gas mileage, I get 19 on average and most people are getting 17-18 with the 6's and trust me I would be willing to sacrifice 2 mpg for the 6's power and longevity.
12-16-2009 10:07 PM
97rangler got a 2.5 in mine, it was the right truck at the time. i had 31s and 3.07s now 35s and 4.56s. it goes great not a powerhouse by any means. sucks on the freeway but it goes offroad all day long and if i get stuck winch it im not proud when it comes to using the winch. you have to upgade the 2.5 more than the 4.0. what im trying to say 4.0 is great 2.5 hasnt let me down with 120000 miles on it. although i do hve my eye on a 4.6 liter out of a mustang........money damn money. btw dont buy it for power cause they both dont have any
12-14-2009 12:05 AM
MYSTANGT I was int he same boat recently and i picked up a 4 banger because it was the right truck at the right price.

I had a 4.0 XJ before and I have got to say that the MPG's are pretty much the same although the 4.0 was a normally powered car, if you wanna call it that meanwhile the 2.5 really is weak and it takes time and effort for it to keep up with traffic.

And thats exactly where your gas goes. Trying to drive normal speeds, you have to let it rev to almost 3K in 1st, quick shift, and so on through the gears until fifth.

Oh and GET READY to downshift at every upward slope, highway too!

All in all I love the wrangler for what it is, i dont really care that some give me looks for going too slow and the down shfting to keep up is kinda fun.

You get the excitement of shifting through gears a lot, especially with the 4.11s in the rear.

All in all, 4 or 6, doesnt matter! Both are reliable, neither will be a powerhouse nor will either be great on gas, so i say: find the right TJ for you and get it!
12-13-2009 10:07 PM
Jeepzcb09 the 4.0 for sure, truthfully indestructable!!!
12-13-2009 09:38 PM
compshooter
Quote:
Originally Posted by AKWrangler View Post
it does great! I have yet to get stuck(Knock on wood) but you would get stuck no matter what size motor you have, alot of it depends on you tires and suspension. I have 31's and a 2 inch lift, if it's just a couple of inches I will put it in 4h and it tracks really well, if starts to get pretty deep I will go into 4L, but you need to maintain your movement to keep your traction, I also throw a couple hundred pounds over the rear axle for the icy conditions on the freeway, I usually can maintain any where between 50 and 60 with no problems. I used to make a thanksgiving pilgrimage to fish Rock Creek just outside of Missoula every year when I lived in Wasington, and they kept the roads pretty clean, so I think you would do pretty good there.

AK, thanks for the response. I was wondering how it would fare in the snow. Very limited with snow here in southern (communist) California. Did great in the 4 inch dusting we received, but curious on the more manly amounts. Guess I'll have to give it a try in Montana.

Thanks.
12-11-2009 10:08 AM
mrcarcrazy 6cyl. As a rule of thumb I've found buying the largest engine available in the vehicle being purchased usually works out to your advantage.
12-11-2009 09:56 AM
05GT-O.C.D. My 1st Jeep was a 4cyl and I was happy with it enough that I bought another 4cyl. My current Jeep is the 6, and while it's better, I got around just fine w/ the 4. The only problems I had w/ the 4 was towing uphill at highway speeds. While the 6 is much better, it's still no power monster.
12-11-2009 09:25 AM
AKWrangler
Quote:
Originally Posted by wetzie View Post
I have owned both and taught my three kids to drive on the first one a 4cyl. We live in a hilly area and the 4cyl was a little under powered. When we bought the 6cyl it brought smiles to us because it solved that problem. We drove the 4 cyl to 110K trouble free miles but really enjoy the power of the 6.
I totally agree the 4cyl is totally under powered, but I think it makes up for it in torque, I am totally in to the torque, I also own a Harley which are notorious for Torque! not for speed. I would probably dig a good 6cyl, but it's just not in the budget for now.
12-11-2009 09:14 AM
wetzie
Quote:
Originally Posted by AKWrangler View Post
it does great! I have yet to get stuck(Knock on wood) but you would get stuck no matter what size motor you have, alot of it depends on you tires and suspension. I have 31's and a 2 inch lift, if it's just a couple of inches I will put it in 4h and it tracks really well, if starts to get pretty deep I will go into 4L, but you need to maintain your movement to keep your traction, I also throw a couple hundred pounds over the rear axle for the icy conditions on the freeway, I usually can maintain any where between 50 and 60 with no problems. I used to make a thanksgiving pilgrimage to fish Rock Creek just outside of Missoula every year when I lived in Wasington, and they kept the roads pretty clean, so I think you would do pretty good there.
I have owned both and taught my three kids to drive on the first one a 4cyl. We live in a hilly area and the 4cyl was a little under powered. When we bought the 6cyl it brought smiles to us because it solved that problem. We drove the 4 cyl to 110K trouble free miles but really enjoy the power of the 6.
12-11-2009 08:54 AM
AKWrangler
Quote:
Originally Posted by compshooter View Post
In Alaska. How does it do in heavy/deep snow? Southern California (I refuse to use ghetto So Cal) gets so little snow I am curious. Retiring in Montana and the TJ is going with me (other 5 cars/trucks are not).
it does great! I have yet to get stuck(Knock on wood) but you would get stuck no matter what size motor you have, alot of it depends on you tires and suspension. I have 31's and a 2 inch lift, if it's just a couple of inches I will put it in 4h and it tracks really well, if starts to get pretty deep I will go into 4L, but you need to maintain your movement to keep your traction, I also throw a couple hundred pounds over the rear axle for the icy conditions on the freeway, I usually can maintain any where between 50 and 60 with no problems. I used to make a thanksgiving pilgrimage to fish Rock Creek just outside of Missoula every year when I lived in Wasington, and they kept the roads pretty clean, so I think you would do pretty good there.
12-11-2009 12:28 AM
compshooter
Quote:
Originally Posted by AKWrangler View Post
I have the 2.5L and I am happy with it, I use it for a daily driver and I get about the same mileage as everyone else. It does great off road, I don't rock climb with it, but I will take it thru the mud and on Fire roads with NP at all. Plus it is cheaper that a 6, although not much resell value if you plan on selling it, which I don't plan on doing, I have 176k on it now and plan on putting another 176k on it.
In Alaska. How does it do in heavy/deep snow? Southern California (I refuse to use ghetto So Cal) gets so little snow I am curious. Retiring in Montana and the TJ is going with me (other 5 cars/trucks are not).
12-11-2009 12:23 AM
AKWrangler I have the 2.5L and I am happy with it, I use it for a daily driver and I get about the same mileage as everyone else. It does great off road, I don't rock climb with it, but I will take it thru the mud and on Fire roads with NP at all. Plus it is cheaper that a 6, although not much resell value if you plan on selling it, which I don't plan on doing, I have 176k on it now and plan on putting another 176k on it.
12-11-2009 12:13 AM
compshooter Daily driver/toy = 4.0
Toy only = 2.5

Both are good engines, but as stated, 2.5's suck ass on the road. Off road, either or. I don't care what anyone says, I've owned both and they are equal in low range.
12-10-2009 02:38 AM
Wolf74 They burn about the same amount of fuel too
12-09-2009 11:42 PM
jdub2k5 I drove both, tested them multiple times, parts and upgrades arent really there for the 4 banger(engine wise)

the power was not bad but after buying a jeep on 35's and a 4.0 I still have more power than a 2.4 and don't have to worry about going up hills

I decided to get a loan for the extra and buy a 4.0 and I am very happy with it
12-09-2009 10:05 PM
tmbrdr69 Jeeps originally came with nothing but 4 cylinders. And if power is what you are after I think that a 5.2L or 5.7L would be more appropriate. If your in California this will be a problem due to smog laws. Whatever you end up with if you hang around here long enough you will be able to build a capable offroad vehicle out of your Jeep. My point being Jeeps were not made for speed. They are the kind of vehicle that you can point at just about any kind of road no matter how torn up it is and go without worry. That being the case speed was sacrificed for things like torque.
12-09-2009 09:57 PM
Chipnpr My 6 cylinder 5 speed gets 20 to 22 MPG and grandma can't catch me.
12-09-2009 09:34 PM
05GT-O.C.D.
Quote:
Originally Posted by TJ Wrangler View Post
Well like everyone said 6 is great for everything but fuel economy. My 4 cylinder 5 spd TJ gets 21-22 mpg if i drive like a grandma. the 6 from what i heard get 15-16 mpg if your lucky. so it all depends on how often and what you'll use it for. The 4 is fast enough for 130 hp.
OK, nevermind. I thought you said the 4 is fast enough for 130mph.

I was getting ready to call BS on that one.
12-09-2009 08:34 PM
TJ Wrangler Well like everyone said 6 is great for everything but fuel economy. My 4 cylinder 5 spd TJ gets 21-22 mpg if i drive like a grandma. the 6 from what i heard get 15-16 mpg if your lucky. so it all depends on how often and what you'll use it for. The 4 is fast enough for 130 hp.
12-09-2009 08:21 PM
Atthehop I agree on the 6 but I drive a 4 to keep the poilce away and my license intact. It's just me.
12-09-2009 07:35 PM
03 RUBI The 6 for sure!
12-09-2009 07:21 PM
motokeen In the automatics the 2.5 seems better than the stick in my opinion. And you must remember the old saying= theres no replacement for displacement. So the 6 will have more power.
12-09-2009 07:13 PM
Jerry Bransford About the only time the 2.5L is equal to the 4.0L is in low-speed offroad work. For mud, snow, sand, highway, around town, etc., the 2.5L is a dog and the 4.0L would far superior. And surprisingly, not even the mpg is going to be different between them. All the 2.5L engine's potential for better mpg is negated by having to drive the 2.5L so much more aggressively to keep up with traffic.
12-09-2009 07:03 PM
nemopar get the 4.0
12-09-2009 05:33 PM
harleyharv 4.0
12-08-2009 08:41 PM
kaycee83 Yea def 6. Although my 2.5 doesn't really bothered me. Hills are the only place i really noticed it, which is manageable. I just put 35's on it & it does surprisingly well, i actually didn't really notice that much of a power loss. I was suprised.
12-08-2009 08:37 PM
05GT-O.C.D. I realize this is your first post, but if you were to spend any time here you'll quickly realize the responses are going to be over 80% 4.0L
12-08-2009 08:35 PM
4Jeepn 6
12-08-2009 08:28 PM
marc1kim I've owned both. Love the 4.0. The 4 banger was slow (which I didn't mind) but if you plan on hardcore mods...you'll be having to deal with the weak D35 rear axle (which is open dif), and other things as well. IMO the 4 banger is good for moderate stuff, puck lift, some 31s, and a true track(or super 35) and hit the trails.
12-08-2009 08:21 PM
Bignuke 6cyl. more power.
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