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Old 04-28-2013, 09:57 PM
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2.4L vs 4.0L

what are the advantages and disadvantages other than speed?

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Old 04-29-2013, 12:54 AM   #2
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well in my opinion
my first jeep 98 2.5 was pretty good power was good fuel economy for me was 19-22 with 31´s 5 spd the only mods was 8mm cables high flow catback and CAI.
and some day ago i bought my first 4.0 she is a 06 rubi 6spd all stock
the power is COMPLETELY DIFFERENT i dont need to down shift at all my pedal is not always touching the floor like my 2.5 was xD
mmmm did i told you that this beauty can actually do a burnout? well it can!!!!!! even if i dont try it hahahahahaha so much power im so happy with the 4.0 and i think it isnt so bad on my fuel because im not using all the pedal =D.
im telling you believe in me 2.5 is awesome so as the 2.4 but they are slow and weak.

advantage of the 2.4 less sparks, more space under the hood, fuel economy maybe 1-2 more mpg, you will never break axels or driveshafts THEY DONT HAVE THE TORQUE TO DO THAT HAHAHAHAHAHAHAHAHAHAHA just a joke but its kinda true they can break of course. but offroad you are going to do almost everything like the 4.0

disadvantages slow and i mean 0-60 in 8.2 years, you cant haul well you can but not very heavy, almost no torque, maybe more engine wear because you need more rpms to keep up with other vehicles

4.0 advantages. more power and torque 0-60 8.5-9.0s all the power you will ever need, 4.0 is very reliable and it last over 300k miles or more.

disadvantages. more sparks, slightly worst mpg i think.

and well that what i think. =)

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Old 04-29-2013, 12:57 AM   #3
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Old 04-29-2013, 01:06 AM   #4
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Wars have started over this question if you want a full on apocalypse ask if be better if manual or auto. That should kick start wwIII.
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Old 04-29-2013, 01:08 AM   #5
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Wars have started over this question if you want a full on apocalypse ask if be better if manual or auto. That should kick start wwIII.
X2, either that or go tell the JKU guys that only real Jeeps have 2 doors.
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Old 04-29-2013, 01:15 AM   #6
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what are the advantages and disadvantages other than speed?
Off road they are practically the same. On road is when the 4.0 kicks ass. You don't have to floor it to get to speed, and you won't have people passing you up hills. I would say the gas mileage on the 2.4 is worse since you will always be flooring it everywhere. You will also be able to run bigger tires in the 4.0 and still have enough power to turn them without snapping an axle.
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Old 04-29-2013, 01:21 AM   #7
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Gas mileage isn't worse. My 2.5L gets 15mpg with 33's and 4.10's.
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Old 04-29-2013, 02:20 PM   #8
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X2, either that or go tell the JKU guys that only real Jeeps have 2 doors.
I thought Jeeps only had two doors

Jeepster is right for the most part. Either motor is great but he is dead on about the acceleration on the highway. With 2.5, u will have to downshift to take off, the 4.0 will just go. Gas mileage is better on 2.5. I get 19-20 mpg using 4.11 and 31's.
I don't have to floor it using 31's w 4.11 gears. My acceleration is fine off the line. I don't have anyone flying by me unless it's some douche flooring his camaro and trying to get a ticket
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Old 04-29-2013, 02:49 PM   #9
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If you can get the 4.0 it's a no brainer. But if I would have found a better deal on a 4cyl I would have made do with it. I do believe the 2.4 tjs are usually more beat up cause you have to drive it like your running from the police just to keep up with traffic. But I test drove a 4 banger drove about 4 miles and brought it back and walked away.
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Old 04-29-2013, 02:52 PM   #10
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My 02 sport with 3.08 and 31s is pretty much a turd but I still love it. And it's still peppier than the 2.4.
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Old 04-29-2013, 03:13 PM   #11
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My 02 sport with 3.08 and 31s is pretty much a turd but I still love it. And it's still peppier than the 2.4.
3.08...... Wow, I bet it's a turd... it's still a jeep and fun to drive
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Old 04-29-2013, 04:02 PM   #12
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I have to shift down on the freeway almost every hill to not drop 5-10 mph and takeoff is only a little slower but I got a 5 speed so that makes up for it. I haven't lost any mpg though from going from 235/75/15 to 31/1050/15. maybe a little better cause I can't gun it as much as I used to lol. Duratracs =gnarly.
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Old 04-29-2013, 04:55 PM   #13
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My 02 sport with 3.08 and 31s is pretty much a turd but I still love it. And it's still peppier than the 2.4.
Doubt it's peppier than a 4. That's severely lacking gear lol. The 4.0 doesn't make that much power to compensate for 3.08's.
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Old 04-29-2013, 05:10 PM   #14
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Truly it's not bad I'm sure 4.10 would be better or even 3.73 but I have no problem on entrance ramps or passing like the 03 se I test drove. It was best left on the trail in my opinion. It was scary trying to merge in 4th with the pedal to the mat
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Old 04-29-2013, 05:14 PM   #15
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Those squirrels were just screaming to get a break lol.
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Old 04-29-2013, 05:29 PM   #16
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I thought I would be able to take a backseat on this. I would like to see a turbo charged four banger over the six. Just because of fuel prices.
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Old 04-29-2013, 05:46 PM   #17
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I'm sorry but you just can't squeeze that much more hp out of these motors without dumping tons of money and changing internals and the gains wont be enough for the cost. Maybe stroking a 4.0 but that gets costly quick
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Old 04-29-2013, 06:13 PM   #18
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Let me write once again that 2.4 is not a 2.5
We're talking about off road rigs here and gearing is everything.
I'd keep my 2.4(4.56)comparing to ANY 4.0(3.07)...
I live on a full of mountains island and i don;t have to step on the gas.
3000rpm isn't exactly flooring,right?
Can't get simplier...
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Old 05-16-2013, 11:23 PM   #19
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If only I knew better when I first bought my Jeep in '08, I would've bought a 4.0. So with that said, i'm driving a 2.5L and I still wished I had bought a 4.0 but i've grown so much to my jeep that i've accepted it. I recently went to a GY Duratrac 33" tires and 4.10 gear and was worried about driving too slow on I-95 but surprisingly, my girl did not do bad at all. 70ish-75mph on flat highway, up to 85 mph on a decline. And she kept up with traffic.
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Old 05-17-2013, 05:14 PM
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If only I knew better when I first bought my Jeep in '08, I would've bought a 4.0. So with that said, i'm driving a 2.5L and I still wished I had bought a 4.0 but i've grown so much to my jeep that i've accepted it. I recently went to a GY Duratrac 33" tires and 4.10 gear and was worried about driving too slow on I-95 but surprisingly, my girl did not do bad at all. 70ish-75mph on flat highway, up to 85 mph on a decline. And she kept up with traffic.

that sounds exactly like my rig drives on 95.question for you though. You said yours runs at 70-75 on flat ground 85 on decline what gear are you in when your running that speed because I have found that I have to be in fourth to keep that speed but my rpms are a little over 3000. In 5th gear I knida level out at 65 ish
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Old 01-26-2020, 08:24 PM   #21
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I have a 97 TJ 4.0L, 5 speed with 106k. No leaks anywhere! But cobbled together cosmetically—mismatched hardtop and doors—needs seats, a little rust under the door, etc...
I have an opportunity to buy an 06 Wrangler with 2.4L, 6 speed with 122K. It’s tricked-out (for an old man Jeep!). Everything is in great shape cosmetically. I see a little more oil on the bottom than my 97 but nothing major.
I use it my Jeep for an extra vehicle but I do use it in the Rockies where I live for some mild off-roading, hunting, fishing, camping, etc...
So my questions are;’l
1) which engine has the better longevity record?
2) with the 2.4, is there a power issue at 7500 feet and higher?
Thanks for your input.
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Old 01-26-2020, 08:40 PM   #22
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4.0 is better in every way....
4 cyl has power issues at sea level lol
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Old 01-26-2020, 09:06 PM   #23
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I have a 97 TJ 4.0L, 5 speed with 106k. No leaks anywhere! But cobbled together cosmetically—mismatched hardtop and doors—needs seats, a little rust under the door, etc...
I have an opportunity to buy an 06 Wrangler with 2.4L, 6 speed with 122K. It’s tricked-out (for an old man Jeep!). Everything is in great shape cosmetically. I see a little more oil on the bottom than my 97 but nothing major.
I use it my Jeep for an extra vehicle but I do use it in the Rockies where I live for some mild off-roading, hunting, fishing, camping, etc...
So my questions are;’l
1) which engine has the better longevity record?
2) with the 2.4, is there a power issue at 7500 feet and higher?
Thanks for your input.
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Old 01-26-2020, 09:10 PM   #24
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The 4 banger has a weaker transmission(Manual) that will fail if you put big meats on it or heavier axles. If you like stock, the 4 banger is fine. If you plan on an LS swap and complete drivetrain upgrade the 4 banger is fine. If you want a lift and 33s you need the 4.0L.
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Old 01-26-2020, 11:30 PM   #25
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Originally Posted by bjk3johnson View Post
I have a 97 TJ 4.0L, 5 speed with 106k. No leaks anywhere! But cobbled together cosmetically—mismatched hardtop and doors—needs seats, a little rust under the door, etc...
I have an opportunity to buy an 06 Wrangler with 2.4L, 6 speed with 122K. It’s tricked-out (for an old man Jeep!). Everything is in great shape cosmetically. I see a little more oil on the bottom than my 97 but nothing major.
I use it my Jeep for an extra vehicle but I do use it in the Rockies where I live for some mild off-roading, hunting, fishing, camping, etc...
So my questions are;’l
1) which engine has the better longevity record?
2) with the 2.4, is there a power issue at 7500 feet and higher?
Thanks for your input.
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