XJ top speed

[Moto]

Anyone know what a 97 and newer, stock XJ with 4.0 and an Auto tops out at?

[JJ13]

Try it and let us know!!!!:D

[XJguy]

I have read that its governed to 120...though its not what I read in Car and Driver.

XJguy

[summit56]

i was doing 115 and still had a little more ways to go pry like 125 or so, i was clocked by an eclipse so i dotn know for sure if his speedo is right. i got 31s so my governer doesnt really stop at 116

[Dr. Dyno]

They're all governed to about 116mph though 4.0 automatic versions are drag-limited to about 112mph. If your speedo's showing much higher than that, it's probably due to some error and maybe also a slight downhill grade.
Mine hits the governor at 116mph and won't go higher.

[Moto]

wow thats pretty decent. I don't think I am interested in actually testing it out although before the lift and all I did have it at about 100 but it just didnt seem too comfortable at that speed.

[TriZZle904]

on my 95 my speedometer stops at 85 but i go to where the line that says mph/kmph is at(basically pointing down vertically) im not sure how many mph that is though

[Steve88XJ]

I've gone "M" and it could have gone faster! Thats about 110-115

With 4 people in the Jeep too!

[Jump This]

I always felt that the XJ was too darn 'twitchy' to even test its speed potential!! Although it will cruise all day at 75mph with no complaint......

[azxjman]

The rare models of police cherokees are certified to 130 mph I dont know how fast they will actually go but I am sure its close to that.

[JeepSpeed]

Also, don't forget that even on a completely stock vehicle (:( ), at 100+ mph, the speedo can be up to something like 10% off(maybe more?), so getting a correct speed is rough at 130. Especially when the speedo on your aerodynamic brick on wheels gave up at 85.

[MudDawg]

Figuring no torque converter slip loss...1 to 1 high gear in my A-904 trans...4.88 gears...tire circumference of 99.27...at the 5,500 RPM rev limit chip on my MSD....105 MPH...give or take depending on if the torque converter slips some and/or if the tires grow from centrifugal force...and if i have the guts to hammer it that hard... :explosion :D

[MonsterXJ]

i have an 84 and the speedo tops at 85, and it takes a while to get there. gotta love that 2.8 with that huge fuel leak, oh wait, thats called a carburator.

[Dr. Dyno]

Originally posted by JeepSpeed
Also, don't forget that even on a completely stock vehicle (:( ), at 100+ mph, the speedo can be up to something like 10% off(maybe more?), so getting a correct speed is rough at 130. Especially when the speedo on your aerodynamic brick on wheels gave up at 85.

Mine reads 195kph (122mph) when I hit the 116mph speed limiter. Speedo's calibrated up to 210kph (130mph) and if I didn't have the limiter, I might even be able to go that fast. Not so sure how stable the XJ would be at that speed but it's certainly stable at 116mph. I have "H" rated tires that are rated to 130mph.

http://www.jeep4.0performance.4mg.com/images/gauges.jpg

[XJ91]

Originally posted by Dr. Dyno
Mine reads 195kph (122mph) when I hit the 116mph speed limiter. Speedo's calibrated up to 210kph (130mph) and if I didn't have the limiter, I might even be able to go that fast. Not so sure how stable the XJ would be at that speed but it's certainly stable at 116mph. I have "H" rated tires that are rated to 130mph.

http://www.jeep4.0performance.4mg.com/images/gauges.jpg

I Kilometers I've hit 160and my foot was not hittin the floor yet. I slowed down when two RSX's flew by me with ease.

[Speed_racer]

Originally posted by azxjman
The rare models of police cherokees are certified to 130 mph I dont know how fast they will actually go but I am sure its close to that.

Im lucky to have the auto column shift copper xj.... and before the lift i saw about 125 (on the speedo, not sure if accurate) and the RPMS were still rising.. but i bailed....... somehow i have selectrac also :eek: :eek: :eek: :eek:

But now, with my lift, foot in floor, wont top 92 :(

[95steel]

Before my mj became a trail vehicle I would do stupid things like race my brother. He was in my z28 and said we were going over 130 through part of Nebraska. I am not sure, knew I was going fast because the sphincter facter was too high to notice anything other than RPM's. Redline in 4th, couldn't get it to redline in 5th.

[Steelerfan]

Originally posted by Dr. Dyno
Mine reads 195kph (122mph) when I hit the 116mph speed limiter. Speedo's calibrated up to 210kph (130mph) and if I didn't have the limiter, I might even be able to go that fast. Not so sure how stable the XJ would be at that speed but it's certainly stable at 116mph. I have "H" rated tires that are rated to 130mph.

http://www.jeep4.0performance.4mg.com/images/gauges.jpg

I know that this doesn't relate to this particular post topic but you have the nicest looking dash that I've ever seen in an XJ.
This has also made me wonder how fast my 89 4.0 auto XJ can go. I'll take some one's word on it because I don't want to go that fast in a lifted XJ., with no rear sway bar and 31's.

[Dr. Dyno]

Thanks!
I sourced the fake wood trim from a junkyard XJ Limited and installed it in place of the original cheap-looking item. As for the gauge bezel, I removed it and spray-painted it with bumper chrome to give it a brushed aluminium look.
What you can't see in the picture is an Autometer 140*-300* oil temperature gauge that I mounted in between the instrument binnacle and the stereo unit (some XJ's have a digital clock in that space, so here's another pic:

http://www.angelfire.com/my/fan/Oil_Temp.JPG

To answer your question, your XJ might reach 105mph but like you said, you'll have to be very brave to try it.

[bjoehandley]

Like the dash Dr., looks good :thumbup: I remember reading somewhere that the police XJ's were limited to 112mph and were not intended for pursuits, even with the 125mph dash, autobahn (German market) suspension, and 130mph tires. Didn't stop one police department from using it to stop a stolen Durango when it's Caprice's and Crown Vic's couldn't keep up (I saw it on "World's Wildest Police Chases", summer '98 I think.)

[scoobyxj]

100 [+/- some i'm shure] in a 2000 with 3", 31's, 3.55, and no speedo gear change. for about 30 min [and i wonder why my cheepo muffler blew out] folowing a kid in a lumna. didn't seem scary at all. the only bad handling trate, was that any dip in the road about threw you threw the roof.

[Atl XJ]

I did 120 in mine (according to my buddies GPS) for a short distance while driving across the desert in New Mexico. I slowed down though since its not made to go that fast and my tires arent rated that high either. It felt like a lot faster than 120, it was kinda scary to tell you the truth.

[JCSXJ]

I did 105 for a hour and a half with my jeep loaded and towing a trailer with my quad in it coming back from the dunes in CA. My freind crashed pretty bad and his throat was closing up on him. The Yuma hospital is just crazy come dune season and he wanted to go to the hospital in Phoenix. That was with a 5.5" lift, 32's and NO swaybar.

[Brian Felts]

anyone who takes an xj stock let alone lifted over 100 is a lunitic.myself included.Yall got a death wish.?Thats what Camaros are for . Im not criticizing you but its just not safe,for you or the other people on the road. :piratefla

[JCSXJ]

anyone who takes an xj stock let alone lifted over 100 is a lunitic.myself included.Yall got a death wish.?Thats what Camaros are for . Im not criticizing you but its just not safe,for you or the other people on the road. :piratefla

Totally agree! Thats the only time it's been over a 100. But my best freinds throat was closing up and he could barely breathe so I said fawk it.

[Marrokstrader]

Alright i know it makes me a lunatic and it's dangerours but where i'm at we have a road heading to the river that is designated quarter mile and so forth in one section. I had two friends...one with a chevelle, and the other with a corvette. The ran behind me the whole way i went down this road. Mind you i have a 91 xj 4 door HO 4.0 with auto tranny and said i was doing 130mph without the pedal to the floor yet. We were on cell phones and at the time i was doin 130 my rpms read about 3100. i am pretty impressed by the performance of it, but it aint something i do everyday seens how i have 266k+ miles on the engine. So i'm sure some yalls cherokee's can handle those speeds as well. and as far as the speedometer goes it was well past the vertical point.

[Atl XJ]

anyone who takes an xj stock let alone lifted over 100 is a lunitic.myself included.Yall got a death wish.?Thats what Camaros are for . Im not criticizing you but its just not safe,for you or the other people on the road. :piratefla

I was in the middle of the desert on a totally flat, straight stretch of road and I hadn't seen another car in many miles. The was no danger to anyone but ourselves. Also, we only went that fast for a minute--curiousity got the best of us. It would have gone faster but theres no way I would have done it--that was scary enough. Mine has a stock suspension with Bilstein shocks on it, I couldn't imagine doing it in a lifted XJ.

[ZmOz]

They're all governed to about 116mph though 4.0 automatic versions are drag-limited to about 112mph.

Recently in my '96 auto I got a chance to go on a closed highway that they're working on in the middle of nowhere. Perfectly straight and flat. (the guys surveying it told me it only rises about 10' in 1 mile) I got up to 115.2 on my GPS, and was still accelerating, but I ran out of road. :D This was with 2 people and a week's worth of camping gear in the back...

[93GRNXJ]

hwy 5, I raced my buddies rx-7, when we were neck and neck i was about 130-135 mph he said, it was a little scary, and the guy who was in my car started to cry, so i let off, that was 5th gear almost redline for me.

these things are soo amazing, its too bad they dont make jeeps like this anymore

[dogtired]

I did 105 for a hour and a half with my jeep loaded and towing a trailer with my quad in it coming back from the dunes in CA. My freind crashed pretty bad and his throat was closing up on him. The Yuma hospital is just crazy come dune season and he wanted to go to the hospital in Phoenix. That was with a 5.5" lift, 32's and NO swaybar.


you are nuts, goin at that speed, but hope your friend is okay. :roll: I did about 105 mpg myself, gas mileage went down the tubes, seemed pretty stable to me :dunce:

:viking:

[Brian Felts]

Let me elaborate a little.Ilive in hilly curvy Tennessee and I have 3 inces of lift.I love speed asmuchn as anyone just not in my cherokee. :NAXJA:

[nitrogt101]

http://www.gottajeep.4wdriver.com/images/speedometer_humor.jpg

I haven't been brave enought to go that fast in my xj, I've only been around 90-95(my speedo goes to 85) and it was pretty wobbly then, so I wasn't about to go further. Although the gas wasn't anywhere near to the floor.... :cool:

[EljayK004]

I got mine up to about 110 and it felt solid as a rock, a little loud yes but it "felt" stable. Would I do it again? Probably not without a darn good reason.

[Gridikal]

was going to top mine out on interstate tonight comming back from class- learned i need an alignment :twak:

[bjoehandley]

Does a Silverado or F-150 in the next lane count as a darn good reason?

[biscuitboy87]

in the hills near mt shasta CA, i hit around 110 mph...as soon as the CHP spotted me (or actually i him) i realised i was going that fast... the xj sees speeds of 90 mph every morning on the way to work... it just runs so much smoother at 70 on up that i hate to drive it any slower. as for those with claims of taking people off the light...V8's and the like...get off the glass pipe cuz the crack is destroyin' yer brains!

[bjoehandley]

Is an E-Class a better excuse then?

[JeepsterXJ]

Gawd, I had my 90 XJ Limited up to 75 (like 80 with the tires) and I couldn't hear myself think. You guys must have street tires... I can't imagine 105. I can do 118 in my 92 Lebaron GTC and feel like I'm doing 50, those are meant for speed, not Jeeps.
http://www.cardomain.com/memberpage/594379/1

[bjoehandley]

Nice GTC Jeepster!, don't see to many of those down this way anymore. Got any mods on the motor?

[JeepsterXJ]

Nice GTC Jeepster!, don't see to many of those down this way anymore. Got any mods on the motor?
Thanks! That one is my stocker, its just intercooled, and that is done to look stock by using a Daytona R/T factory setup. My GTS on the other hand is fairly well modded, pics and specs are here: http://www.cardomain.com/memberpage/385696/1

[bjoehandley]

Nice GTS, I used to have an '85 T1/Auto/SH2 equiped one. It was black with gold pinstriping (actually, it looked alot like yours, just w/out the sunroof, third brake light, all the trim is chromed, and it had pizza wheels), with dark red leather! Unfortunetly, mine only had one of the 85mph speedo's, so when it passed 85, the needle would just wiggle back and forth. I finally lost it to rust and old age in June of '03. How well does yours run with the work you've done? Mine had a drop in K&N, MPP overflow injectors, MPP 8mm wires, Accel SS coil, and 3" exhaust with Dynomax 3" truck cat and 3" Ultraflow glasspack (one of the ones Gu's tested against the Worlock.)

[JeepsterXJ]

well, now that we've hijacked this thread, lol: She runs perfectly. The engine has 1000 miles on it, complete rebuild with only the best, total buildup was 5 years and $6000+ in the making. It has 3" exhaust all the way as well. The warlock was picked because it was quieter w/o the cheater pipe opened. I've only put 500 miles on her since last october, I need to align her after installation of the Eibachs and I'll have her on the road in the spring. I plan to take her to several shows next year. Your car sounded quite nice. Mine was actually gold trimmed, as were all the 89 GTS's, but it was converted to silver/grey before I got her and I couldn't be happier of their decision.

[Dr. Dyno]

I took my XJ out on a near empty highway last night and tested its top speed again. I already knew that the top speed limiter would cut in at 116mph in 4th except this time I also did it in 5th (speedo showing 195kph), and I only had my right foot at about 1/3 throttle! If I could disable the top speed limiter I could easily reach 130mph. In 4th gear the Jeep was still pulling like a freight train when it hit the limiter and it felt very stable indeed.
______________________
Dino's "Mean Green Machine"
1992 XJ Laredo 4-dr - 4.6L I6 HO Stroker - 178k miles - AX15 (http://www.off-road.com/jeep/tech/trans/ax15.html), NP231 (http://www.off-road.com/jeep/tech/xfer/np231.html), D35c (http://www.off-road.com/jeep/tech/axle/d35c.html), D30 (http://www.off-road.com/jeep/tech/axle/d30.html)
http://www.dragtruk.com/PICS/small.A9DFB5LA1GZW1.jpg
258hp@4800/320lbft@3200, 1/4 mile = 14.61@94.9, 0-60 = 5.9secs
Websites - Jeep 4.0 Performance (http://www.jeep4.0performance.4mg.com), 4.6L Stroker Build-Up (http://www.angelfire.com/my/fan/stroker.html), Dino's Jeep Tricks (http://www.angelfire.com/my/fan/)

[bjoehandley]

Wish there was enough empty roads around here to even try that Dyno, wonder what it will do with out the restricter? Good luck!

[Dr. Dyno]

The only way to disable it is to disconnect the wiring harness from the VSS (vehicle speed sensor). The only problem there is that the speedo and odometer won't work anymore so you'll have to rely on the tachometer to calculate your speed. I know mine is 26.6mph/1000rpm in 4th and 33.6mph/1000rpm in 5th.

[spazegun2213]

hmm, is there a limiter in all jeeps? I have raced past 107 (i know this because my friends ZX-2 is limited to 107) and there was never a problem. the only problem is that the speedo in my 98 only goes to 100... so umm... i'd need someone pacing me in a fast car. I have done over 100 many times in 4th gear, so i have yet another gear to go.

[Osprey413]

I did the math last night and figured out that the 4.0L at redline in third gear, with 235/75/15 tires, and 3.55 diff ratio, the max speed possible is 121mph. Of course you could never reach this because Jeeps a bricks and the wind resistance would slow you down.

[theslacker]

My 92 4.0L auto hit 170kph downhill before I ran out of road but she was still pulling hard

[Atl XJ]

I did the math last night and figured out that the 4.0L at redline in third gear, with 235/75/15 tires, and 3.55 diff ratio, the max speed possible is 121mph. Of course you could never reach this because Jeeps a bricks and the wind resistance would slow you down.

Mine hits the redline in 3rd at around 100 mph. You'd never hit the redline in 4th though, it'd be like 140.

[Osprey413]

Not enough power to go to redline in 4th. Not to mention the speed limiter. Maybe if you had a stroker and removed the limit... then you probably could.

[PapaPump]

Alright i know it makes me a lunatic and it's dangerours but where i'm at we have a road heading to the river that is designated quarter mile and so forth in one section. I had two friends...one with a chevelle, and the other with a corvette. The ran behind me the whole way i went down this road. Mind you i have a 91 xj 4 door HO 4.0 with auto tranny and said i was doing 130mph without the pedal to the floor yet. We were on cell phones and at the time i was doin 130 my rpms read about 3100. i am pretty impressed by the performance of it, but it aint something i do everyday seens how i have 266k+ miles on the engine. So i'm sure some yalls cherokee's can handle those speeds as well. and as far as the speedometer goes it was well past the vertical point.

okay that guy is a moron. jeeps can not do 130. they will redline in 3rd though, i have done it. I have a 5 speed so my gears are tall, but with 205/75r15s and 3.07 rear end gears, thats ends up being around 97 mph. that is not a completely accurate number of course because of the imperfections in tire sizing, but it is close. that is with the speedo pointing straight down at the mph, amybe a little past. if i could redline in 4th, it would be 138 mph, but it can't, so no i won't be challenging any 5.0s to topend tests. i do think it is unsafe on lifted jeeps especially with q rated tires (bfg mts, yokohama, most other mts)(99mph), i have h rated tires and no lift, but i dot think wagons are known for downforce either, one mistake and you are gone. have fun!

[ZmOz]

okay that guy is a moron.

Agreed. With the 4.0 and AW4 you'd be going about 98mph in overdrive with 225 tires at 3100 RPMs. To get to 130 you'd have to be doing around 4200 RPMs in overdrive, I doubt that's possible power wise, and the speed limiter would stop you anyway.

[Atl XJ]

yeah, it think they are governed at 116, I've had mine to 120 (GPS) but speedos arent entirely accurate and the faster you go the more off they are so that makes sense. Its really dangerous, and I'd never do it again in an XJ. Its dangerous to drive that fast on a public street anyway, but if you are going to do it, do it in something that is at least designed for it and has the proper tires.

[Mike@Accurate]

I have a '00 2 door auto. Supercharged, 8# boost & 300hp. I hold it foot to the floor untill it shuts off at least once a week. A couple of factors come into play. It won't shift into OD or Lock-up with your foot to the floor. TPS WFO and MAP 0 and it will stay in third. I did the mph/rpm thing (in 3rd below lock-up), and went out the first time. It shut off at what I thought was the rev limit of 5200 or so. If you figure in a really good slip# (truck had no miles on it when I put the S/C in), I came up with 128mph. I've been using this as my mental top speed. I recently took off the JUNK goodyears it came with, and put on a set of Michelins. Now it is so smooth at speed that I drive 20mph faster all the time. You can be going 100 with absolutely no drama. Creeps up on you. So I have been bouncing off of the limiter more lately. Then I got the 12/04 JP ragazine. "Adding 20hp to the 4.0" "Step 5 " Hypertech Power Programmer for '96-'04 X/Z/T J's. Among other cool things "Adjust your top speed limiter to 116 or 128 mph"... No poop. If ever there was an XJ that would do it, that would be me. I'm inclined to believe it. If you back off even a little it will drop into OD/Lock-up and go 125ish all day. I never did the top end run less than WFO, tomorrow I may try to ease up on the top end in OD and see if it shuts off again. That would probably clinch it.
When the S/C was on my '97 TJ 5spd it would be brutally accellerating when it hit the 116mph limit. That truck was mean. If I could unlock it's potential....shew! (1/4 in the 14's with a wheelie to the rev limit in 1st and a 1.9 60' time). It IS squirrelly though. So for the time being I'm staying with 128mph. MIKE

[phaythe]

Wow, I keep reading about everyone getting scared right around 100mph...I hit my gov. at least once a week...but them I'm psychotic and happen to drive deserted country roads on a daily basis...and yes, it is gov'd at 116mph...I regularly drive to the gov and back off and cruise at 110 in OD...
Hell on the freeways around here it isn't uncommon for me to have my cruise set at 90mph...

and I just so happen to own a 1997 Auto 4.0...