Which is better 4cylinder vs 6 cylinder - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Engines & Drivetrain > Which is better 4cylinder vs 6 cylinder

Attention to the TJ owners 1996-2006 NEW LED LIGHT OPTIONSBaseline 4x4 Lifetime Warranty 4340 Chromoly Axle Shaft KiBushed Sleeves & Poly Bushings!

Reply
Unread 07-19-2013, 08:10 PM   #1
newguytoday
Registered User
 
Join Date: Jul 2013
Posts: 17
Which is better 4cylinder vs 6 cylinder

Like the subject says what do think is better a 4 cylinder wrangler or a 6 cylinder my dad says to get a 4 since its better gas mileage but I don't think it will be able to go up Rocky Mountain like a 6 cylinder would. What do you think?

newguytoday is offline   Reply With Quote
Unread 07-19-2013, 09:45 PM   #2
tyvanwie
Web Wheeler
 
tyvanwie's Avatar
1998 TJ Wrangler 
 
Join Date: Sep 2012
Location: Boone, North Carolina
Posts: 8,880
6
__________________
MY BUILD THREAD
MY FITNESS LOG/TRANSFORMATION
JK AND TJ PARTS FOR SALE

I'm pretty sure I know what I'm talking about. I think...
tyvanwie is online now   Reply With Quote
Unread 07-20-2013, 12:40 AM   #3
DipCope
Registered User
2001 TJ Wrangler 
 
Join Date: Jul 2011
Location: Phoenix, AZ
Posts: 44
use the search function
DipCope is offline   Reply With Quote
Unread 07-20-2013, 02:20 AM   #4
DaemonForce
Registered User
1983  
 
Join Date: Jun 2013
Location: Centralia, WA
Posts: 99
Ah, the inlines. These are my favorite options. I prefer the 4 because of gas mileage but I started with the 6 and found it to be easy to work on. The 4 puts out the same amount of power as the 6 if not a little more. I always found this part to be confusing because it's doing the same amount of work less 2 cylinders. THEN when fuel injection and other options were added, the figures began to look more appropriate for the designs. The reliability is there either way but the 6 has far more power at lower RPMs. If you climb mountains I would suggest a stroked and injected 6. There's just something about having 280ft-lbs of torque ready at any moment to climb things where 2WD vehicles can't climb.

For light offroad I would suggest the fuel injected 4. If you only do freeway driving and you managed to find a small super light car body like a Hornet, Concord or Eagle then it starts to become a fun circus just because these are a little more aerodynamic than a brick. If you can find a DJ-5 I would go the inline 4 Audi route. A balance needs to be struck between the power you have and the what you intend to use or you're just going to have a heavy and awkward junk heap.
DaemonForce is offline   Reply With Quote
Unread 07-21-2013, 06:56 AM   #5
jeepdaddy2000
Web Wheeler
 
jeepdaddy2000's Avatar
1971 CJ5 
 
Join Date: Jan 2002
Location: Eagle Point Oregon
Posts: 5,958
I have yet to see a 4 get as good mileage as a 6. It is simply too small and has to work too hard to push that breadbox through the air at highway speeds. Add the inevitable lift kit and larger tires, and the four falls further behind. While there were some issues with the some motors due to the stepper carbs, the 4.2 is pretty much universally seen as one of the best engines to come down the pike.
My preference would be the 6, hands down.
jeepdaddy2000 is offline   Reply With Quote
Unread 07-22-2013, 02:37 PM   #6
Wheelin98TJ
JEEP FREAK
 
Wheelin98TJ's Avatar
1998 TJ Wrangler 
 
Join Date: Apr 2004
Location: , Southeast MI
Posts: 23,695
MPG difference between the 4 and 6 is negligible.

The only good reason to choose the 4 cyl is to save money with the purchase price.
Wheelin98TJ is offline   Reply With Quote
Unread 07-22-2013, 05:24 PM   #7
BlueRubiconrich
Registered User
1986 CJ7 
 
Join Date: Oct 2009
Location: worcester, Ma
Posts: 1,939
get a six they last longer!
__________________
Rubicon Rich ,05 TJ Rubicon: PatriotJeepers.com
86 CJ7 258,T18,Scout Dana300,twin sticks,Dana44's,4W Disc, locked,35's,YORK OBA,Warn 8274,fullcage.
51 M100 1/4 ton Jeep trailer
BlueRubiconrich is offline   Reply With Quote
Unread 07-22-2013, 05:28 PM   #8
2013JKRubicon
Registered User
2013 JK Wrangler 
 
Join Date: May 2013
Location: Batesville, Arkansas
Posts: 63
Get a 6
2013JKRubicon is offline   Reply With Quote
Unread 07-23-2013, 12:07 AM   #9
schitzangiggles
King of Macastan
 
schitzangiggles's Avatar
1993 YJ Wrangler 
 
Join Date: May 2005
Location: Rigby, Idaho, Macastan (Idaho)
Posts: 5,605
You purposely buy a 4 banger to swap in a V8.
I have to agree the 4 banger gets WORSE mileage than the I6/V6.
I bought a 4cyl once and resold it within a week after wheeling a buddies identical jeep but with an I6.
__________________
"Axeheads are supposed to be sharp, but you are one blunt tool."
FLynes



If you love wealth more than liberty,the tranquility of servitude more than the animating contest of freedom, go home from us in peace. We seek not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains sit lightly on your shoulders and may posterity forget that you were our countrymen.
-Samual Adams

A government big enough to give you everything you want is big enough to take everything you have.
Thomas Jefferson

Calling Illegal Aliens "Undocumented Immigrants" is like calling drug dealers "Unlicensed Pharmacists"

Nemo Me Impune Lacessit
"No one provokes (attacks) me with impunity".


"Your right, the Tea Party and the OWS are the same, just like the America Revolution and the French Revolution were the same. The only problem is the American Revolution ended with Liberty, Freedom, Justice for all and a shining light upon a hill. The French Revolution ended with lynchings, guillotines, murder and socialism. So yeah, I could see how one could confuse the two..."

Mac Wilson
schitzangiggles is offline   Reply With Quote
Unread 07-23-2013, 01:03 AM   #10
davemix
Registered User
 
Join Date: Jul 2013
Posts: 5
We have the in-line 6 4 L in two jeeps and 88XJ with 150,000 miles on the stock motor which still passes smog. Lifted and with big tires maybe gets 14 to15 miles to the gallon. Now the stock 94 ZJ grand Cherokee with the newer 4 L six-cylinder. It is an awesome running car also with over 150,000 miles on the stock motor with a rebuilt transmission as in the other jeep a rebuilt transmission it will get almost 19 miles per gallon on the highway. When test driving cars one day including the new Odyssey minivan and also a Honda pilot I swear this 94 ZJ ran smoother and quieter than any of the new cars I drove that day. Although it is not perfect at this moment even though it runs perfect like a top and shows no error codes I am still trying to get it to pass smog because of high nox. I have another thread on that subject in engines. go four liter r six-cylinder in-line what an awesome motor I've heard that they can go to 300,000 miles, I am halfway there with mine
davemix is offline   Reply With Quote
Unread 07-23-2013, 01:14 AM   #11
davemix
Registered User
 
Join Date: Jul 2013
Posts: 5
To be clear don't get the V-6 that came out in 2007 it was supposedly underpowered and not nearly as good as the previous straight six. Now in 2012 the jeep came out with the new penta star, that is being used in the 2013 Dodge ram trucks it is an awesome motor with 285 hp. I am waiting for Dodge or Chrystler to use the new 3 L diesel in the wrangler I see that first it will appear in the2014 grand Cherokee and then in the Dodge 1500 ram trucks and then I bet you we are going to see a diesel 3 L in the wrangler, That will be awesome
davemix is offline   Reply With Quote
Unread 07-24-2013, 10:04 PM   #12
TomsRubi
Registered User
2004 TJ Wrangler 
 
Join Date: May 2011
Location: Harrisville Township, OH
Posts: 76
Just to throw it out there, I happen to know my friend and fellow member, WeezyBlue, used to own a 2006 TJ with the 4 cylinder with STOCK 3.73 GEARS and achieved upwards of 20mpg. This was also with the 6spd manual, a total lift of around 4.5" and 33" Federals mud terrains. He now has a 2005 Rubicon on 32s with the 6spd and gets around 15-16mpg. I also have a 2004 Rubicon on 33s with the 5spd and usually get around 16-17mpg. A lot of it depends how you drive, your gearing and transmission. On a side note, one of our wheelin buddies owns a 1995 cherokee on 35s, lifted about 6-8"(not entirely sure) with the 4.0 automatic, 4.56 gears. He's somehow magically getting over 20mpg sometimes even 25mpg! Trust me, the math is right. We've tried it several times. Just another testimony, that's all.

Sent from my turtle in a half shell.
__________________
2004 Rubicon "Leo"
Mystery Pro Comp lift ~ 4" (installed by PO)---1.25" JKS BL---1" Bombproof MML---Currie Currectlync HD Steering---JKS Adjustable Front Track Bar
35X12.50R15 BF Goodrich KM2s on Eagle Alloy 15"x10"---Warn 9.5ti
TomsRubi is offline   Reply With Quote
Unread 07-25-2013, 05:17 AM   #13
jeepdaddy2000
Web Wheeler
 
jeepdaddy2000's Avatar
1971 CJ5 
 
Join Date: Jan 2002
Location: Eagle Point Oregon
Posts: 5,958
Quote:
Originally Posted by TomsRubi View Post
Just to throw it out there, I happen to know my friend and fellow member, WeezyBlue, used to own a 2006 TJ with the 4 cylinder with STOCK 3.73 GEARS and achieved upwards of 20mpg. This was also with the 6spd manual, a total lift of around 4.5" and 33" Federals mud terrains. He now has a 2005 Rubicon on 32s with the 6spd and gets around 15-16mpg. I also have a 2004 Rubicon on 33s with the 5spd and usually get around 16-17mpg. A lot of it depends how you drive, your gearing and transmission. On a side note, one of our wheelin buddies owns a 1995 cherokee on 35s, lifted about 6-8"(not entirely sure) with the 4.0 automatic, 4.56 gears. He's somehow magically getting over 20mpg sometimes even 25mpg! Trust me, the math is right. We've tried it several times. Just another testimony, that's all.

Sent from my turtle in a half shell.
I may stand corrected....
I have no experience with the 4's Chrysler is installing in the modern Jeeps. It may be an improvement over the previous 134's and 150's offered.
jeepdaddy2000 is offline   Reply With Quote
Unread 07-28-2013, 08:19 AM   #14
HCallahan
Registered User
2003 TJ Wrangler 
 
Join Date: Mar 2012
Location: Charlottesville, Virginia
Posts: 220
The AMC/Jeep inline six, both the older 258ci and the newer 4.0L (about 244ci) were some of the best Jeep engines ever built. The newer 4.0L has the advantage of fuel injection and an excellent electronic ignition system but the older 258 was very reliable as well. I've seen both examples routinely go over 200K miles and some make it 300K! As other have said, the gas mileage is about the same between the 4 & 6 cylinder, with the difference being that the 6 has far more torque. The bottom line is the 6 is far more "drivable", burns about the same amount of gas (maybe less sometimes), doesn't work as hard and generally lasts a long time. The 4 cylinder is an OK engine in some applications (mail jeeps, rental vehicles in coastal towns, etc.) but probably shouldn't be used in a 4WD vehicle with the aerodynamics of a brick that is driven in the real world. You just can't beat that inline 6 for reliability and torque.
HCallahan is offline   Reply With Quote
Unread 07-28-2013, 08:24 AM   #15
HCallahan
Registered User
2003 TJ Wrangler 
 
Join Date: Mar 2012
Location: Charlottesville, Virginia
Posts: 220
My typing skills are non-existent -the last line in the prior post should read, "You just can't BEAT that inline 6 for reliability and torque".
HCallahan is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.