Offroad, the 2.5L is fine... but I wouldn't buy a TJ with the 2.5L if I had to drive on the highways/freeways much. And the 2.5L doesn't really even get any better mpg than the 4.0L does in reality because it has to be driven so much more aggressively to keep up with traffic than the 4.0L does.
Remember that having a different opinion doesn't also require one to be a jerk when expressing it.
if its lifted, with larger tires make sure it was regeared, otherwise it'll seem weak on the highway or up hill. if your easy on the 4cyl though like I am with mine it will get MUCH better mileage than the 6. I don't care what others say in my 97 2.5 I get between 20-24 mpg all the time. but I'm easy on it. they'll last forever, just linked the 6. but the key is driving style, if your off roaring a lot the 4 will be just as good as the 6. if you like to do more than 60 get a 6.
cant comment on the 2.4L which is what's in that 2006. its a neon motor if that tells you anything. i would get another 2.5L without hesitation as long as it's a manual. the 4.0L is a better choice than both because you can live with either a manual or auto.
2003 Rubicon, 4.0L, 5SPD, Custom 4.75" lift, 33" MT Baja Claws
1999 SE, 2.5L, 5SPD, sold it
PM me for wheeling in and around Northern Illinois
i have a 2001 2.5l with 35's with 4.11 and it does fine on the road and great off road its no race car i have drove the 6cyl and they have more power for sure but i like have the little motor i cant complain
Im a proud owner of the 4banger 2.5L and i have a good mpg like 19-23 BUT THE ONLY BAD PART ABOUT THE 2.5 is the power it take like 16-18 seconds to get to 60mph and power is very bad, for 2 persons offroading its the same as the 6cil but one day i was towing my boat (small boat like 600kg with camping gear and food) and 4 of my folk highway i couldnt reach 70 mph even i was in 4 gear pedal to metal and not more than 65mph but well i know i did bad, but really if you want to go to a 4 cil is easy on the gas but not the power and the 6cil gets better MUCH better power and just barley worst mpg. so its up to you. BTW my jeep is the 98 std and it has STOCK 4.10 GEARS i know that every 4cil 2.5 manual has 4.10 the 2.4L manual has 3.73. also the 2.5L has more low end torque and the 2.4L has more torque BUT in the high rev range, for me the 2.5 is better than the 2.4 but i could be wrong.
I recently purchased an 05 with the 2.4, with P235/75R15XL tires, Overall Diameter 28.9 it runs great on the highway. I can try and take it easy at 60 and find Iím going 70 without realizing. Without running the AC it easily gets 24MPG on my commute . Itís all the Jeep I need.
I ended up with the 4 cylinder because of my jeep's overall excellent condition otherwise. It's the 2.5, manual, 4.10s and 31's. I'm the slowest car out there, but I don't care. We're not racing and not towing anything and I'm very happy with the 4.
I would say if you are tired of looking at jeeps and this is the cleanest one, buy it with the 4. If you can wait for a long time, you'll eventually find a clean jeep with a 6.
I'm happy with my 2.4. I'm still mostly stock. I've just got some 31x10.50 mud tires, and I drive 100 miles every weekend on the interstate runnin 80 mph the whole way in 6th. For me I don't have any problems with the power of the 4cyl.
i love my YJ but thats cuz its my first Jeep. i knew what i was getting into when i got the 4 cyl. its fine around town but is awful on the highway. eventually when i upgrade to a newer jeep i will make sure its a 6cyl
My first Jeep was a 97 TJ, with the 2.5. It was a solid engine, and I never had any problems with it. I had 30" BFG A/T's on her, and I didn't notice that much difference in performance between stock shoes and the taller tires. That being said, I was never impressed with the power produced by the 4 banger. My 01 Sport has the 4.0. When I was looking for a a new Jeep, I looked at a few 2.5's, but remember the disappointing feeling I felt when I stepped on the gas. I drove a couple of 4.0's, while I was looking and the difference was amazing. I waited a few weeks, maybe a month, and found my really clean 01 Sport, with 78,000 miles on it. Well worth the wait. IMO, its like buying a shorter lift, just to have a lift, and then regretting that you didn't wait a little longer and go taller. You don't want to be when you could be
Had both a 2.5 and now a 4.0 and there is definitely a big difference. Both are very reliable engines and if its just a trail rig then a 4 cylinder is just fine...but if you plan to drive it on the highway or drive on some hilly roads id advise against the 4.
It was a real chore to get the 2.5 up to highway speeds on onramps, and i usually had to downshift to 2nd to get any real power up big hills. I couldnt imagine how much of a dog that jeep would have been with an automatic. MPG with 31's was around 16-17 average with the 2.5, same as my 4.0.
All that said the 06 will have the 2.4 neon engine which is much different than the 2.5 amc...a little more hp, possibly better mpg...but its still a 4 cylinder and its really tough to beat a 4.0. Plus the 2.4 neon engine uses a timing belt that needs to replaced at certain intervals which is usually a pricey labor charge so keep that in mind too.