Acceleration JL vs JK

[Sftdyna0326$]

Sure you weren't driving a supercar?

Compared to my friends JK he thought I was! LOL

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[1quick1]

My JL 4 door with auto, 35" tires, and 3.45 gears would smoke my last 2014 JK 2 door auto, 33" tires, and 3.73 gears.

 

[Sftdyna0326$]

My JL 4 door with auto, 35" tires, and 3.45 gears would smoke my last 2014 JK 2 door auto, 33" tires, and 3.73 gears.

And not to beat a dead horse but the difference is impressive! Especially since most people only understand peak HP And torque and don’t get how fast and powerful something can feel when you can make the same peak numbers but over a much broader RPM range. Couple that to an 8 speed and in my case 4:10’s and it’s huge.

 

[CZ 75]

My JLUR scoots off the line with some zest. Definitely better than my 2 door JK with 3.21s. Once I'm rolling at highway speeds I dont notice much of a difference.

The 8 speed feels as smooth as my wife's Highlander. The pentastar though isn't as smooth as the Toyota mill.

 

[DanW]

Lol, you guys ought to feel the contrast I feel every time I get out of my 2008 JKUR with the 3.8 and 33's and get into my JLUR with 35's. I still love the JK, and enjoy driving it, but I just laugh out loud and have a perma-grin when I get behind the wheel of that JL. Both are 6 speeds, btw. Like I said before, that old 6 speed feels like a dump truck tranny compared to the new one.

 

[Majestic]

Spent all morning playing around, checking welds, glass and seal fitment and just going over the truck as I am so anal my wife has threatened divorce on many occasions and I do believe FCA has been addressing issues as they go along! Every hardtop,door and windshield seal along with all welds are pretty much right on, it’s by no means Mercedes perfect ( not that there really on there game anymore either) but all in all very nice. My biggest complaint is I’m a technology idiot and can’t figure out the u connect features! Last night all my daughter did was plug her phone in to charge it from the back seat and all her screen apps appeared! It was a very interesting ride home to say the least as she is only 15 and all her texts were showing!

It sounds like your daughter accidental engaged Carplay or Android Auto by plugging in.

 

[Majestic]

Lol, you guys ought to feel the contrast I feel every time I get out of my 2008 JKUR with the 3.8 and 33's and get into my JLUR with 35's. I still love the JK, and enjoy driving it, but I just laugh out loud and have a perma-grin when I get behind the wheel of that JL. Both are 6 speeds, btw. Like I said before, that old 6 speed feels like a dump truck tranny compared to the new one.

I’ve driven the JL and it was nice, but definitely just feels like a Jeep to me. I must not have drank the same giddy juice. Maybe your 2008 was just a bit past it’s prime?

 

[DanW]

I’ve driven the JL and it was nice, but definitely just feels like a Jeep to me. I must not have drank the same giddy juice. Maybe your 2008 was just a bit past it’s prime?

Wow, if you can't feel the difference, you may need to see a doctor. My JK runs and looks like new, and is meticulously maintained. The transmission is new (factory reman) and the engine compression meets new spec. It is actually quicker than most other 3.8 JK's I've driven, with it's 6 speed and 4.10 gearing. The JLUR absolutely trounces it.

 

[BVGeezer]

Compared to our 2012 JK manual, the 8 speed auto on the JL is light years ahead.

 

[That One Guy]

Lol, you guys ought to feel the contrast I feel every time I get out of my 2008 JKUR with the 3.8 and 33's and get into my JLUR with 35's. I still love the JK, and enjoy driving it, but I just laugh out loud and have a perma-grin when I get behind the wheel of that JL. Both are 6 speeds, btw. Like I said before, that old 6 speed feels like a dump truck tranny compared to the new one.

that JK 6 speed... Not the smoothest lol. I highly preferred the Aisin in most TJs and YJs.

 

[Majestic]

Wow, if you can't feel the difference, you may need to see a doctor. My JK runs and looks like new, and is meticulously maintained. The transmission is new (factory reman) and the engine compression meets new spec. It is actually quicker than most other 3.8 JK's I've driven, with it's 6 speed and 4.10 gearing. The JLUR absolutely trounces it.

You’re going from a 10 year old JK with an obsolete engine to a brand new one with a current engine. You were overdue for an upgrade, but from a newer 3.6L JKUR with 4.10’s the JL just feels like a newer JK. I’d still get one, but the drivetrain itself is fairly negligible.

 

[DanW]

You’re going from a 10 year old JK with an obsolete engine to a brand new one with a current engine. You were overdue for an upgrade, but from a newer 3.6L JKUR with 4.10’s the JL just feels like a newer JK. I’d still get one, but the drivetrain itself is fairly negligible.

Nope. Read ealier posts comparing it to my buddy's 3.6 2 door JK Rubi. I just brought that up as an extreme example. The JL pulls away from the JK, even when the JK has 2 fewer doors and a weight advantage. It pulls away off the line and keeps pulling away up to redline. We ran to about 70mph. JL wins every time.

 

[Majestic]

Nope. Read ealier posts comparing it to my buddy's 3.6 2 door JK Rubi. I just brought that up as an extreme example. The JL pulls away from the JK, even when the JK has 2 fewer doors and a weight advantage. It pulls away off the line and keeps pulling away up to redline. We ran to about 70mph. JL wins every time.

I’m positive the JL holds the advantage, but as far as actually feeling it..I don’t. It’s still feels like a Jeep to me. The world’s fastest school bus is still just a school bus.

 

[BDJeep1]

I had a 2015 JK Rubicon Hard Rock with 4.10. Now I have JL Rubicon. Both 2 doors with autos.

The acceleration difference is noticeable. Faster and smoother.

 

[Majestic]

I honestly think more people are sensitive to it because of the placebo effect.
There’s only a half second difference in quarter mile times between a JK and JL.
Most people can’t perceive a half second difference. Factors from humidy, air density, temperature, altitude, engine temp, etc can vary quarter mile performance by over a second on the same vehicle.
Unless one can perceive the day to day performance fluctuations in the same vehicle, odds are they won’t be able to perceive the performance difference between one vehicle to another with an even tighter theoretical performance gap.

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