Pros and cons of 4cy -vs- 6cy - JeepForum.com
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post #1 of 34 Old 02-26-2007, 12:58 PM Thread Starter
ut1031
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Pros and cons of 4cy -vs- 6cy

I am a new member and looking at making a Wrangler purchase, but would like opinoins of the 4cy -vs- 6cy. This Wrangler will be used mostly for running around town by my wife and the occasional trip to Moab. I am thinking of a 2-4in lift and 32 tires. Any and all opinions are greatly appreciated.
Thanks,
Kelly

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post #2 of 34 Old 02-26-2007, 01:02 PM
ramburger
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4 cyl. is fuel injection and has 4:10 gears
6 cyl. can be fuel injection and has 3:07


i could go on, but do yourself a favor and get the 6. too many stories of the 4 banger being a dog.
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post #3 of 34 Old 02-26-2007, 01:15 PM
yJ rod
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I would LOVE to have the 6 in my Jeep. Go for the 6.

3.5' BDS, 33'/12.50' BFG M/T, Herculined tub, Cobra CB, Homemade 1/4 inch bumpers, TJ flares with trimmed fenders, Homemade trunk box, No sway bar, no track bars. Daily driver.

My Jeep is in the June issue of Petersens 4 wheel and off-road! Page 14 under Urban Wheeling.
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post #4 of 34 Old 02-26-2007, 01:23 PM
gary1
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The 4 cyl is adequate, (barely). They are more plentiful and probably considerably cheaper to buy. I would suggest driving one of each and deciding for yourself whether the increased horsepower of the 6 cyl is worth the extra cost. I do think though that most people with the 4 cyl would love to have the six. (ME INCLUDED)
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post #5 of 34 Old 02-26-2007, 01:28 PM
EABiker
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4cyl pro... a set of sparkplugs is cheaper!
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post #6 of 34 Old 02-26-2007, 01:58 PM
flawrangler
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If you get a 4 cyl you will want a 6. I use my 89 yj for towing a small sailboat(1500 lbs) and wish I had a 6cyl.
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post #7 of 34 Old 02-26-2007, 02:04 PM
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4.0 way to go.. i dont have a 4 banger, but i did in an isuzu trooper and hated it.. i have 4.0 in both my jeeps and love the power.... especially if you are goning to wheel it and add more weight, like big tires, skids, winch, ect... the extra displacment and cylinders come in handy...

'98 ZJ 5.2 up-country
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post #8 of 34 Old 02-26-2007, 02:06 PM
Redskinswin
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2.5 L had throttle body injection up until 92 I believe. If you get a 2.5 get a 92 or newer. Not much extra power but it is some.

2012 Wrangler. Stock, for now.
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post #9 of 34 Old 02-26-2007, 02:06 PM
Angelous
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I love my 4 banger!!
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post #10 of 34 Old 02-26-2007, 02:16 PM
David K.
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I am swaping out the 4 banger now at a much greater cost than just buying the 4.0L. My XJ has the 6 and there is NO comparison. The motor is just so much mo-better. The big tires will suck what little life a 4 banger has right out of it. Don't believe the hype about gas milage either.

4 Banger lifted and 33's is prolly only 70HP @ the rear wheel. some guys lie to themselves saying that it is OK. That is terrible. Cost of regearing is close to the difference in just buying the 6.
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post #11 of 34 Old 02-26-2007, 02:19 PM
gary1
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Quote:
Originally Posted by Redskinswin
2.5 L had throttle body injection up until 92 I believe. If you get a 2.5 get a 92 or newer. Not much extra power but it is some.

Also, if you decide on the 4 cyl. you can pick up a throttle body from a 4.0L 6 cyl. on ebay. Remove the air restrictors from the inlet and outlet of the air box and bolt on the larger throttle body. You can even add a spacer between the manifold and throttle body for a little extra increase in HP.

I did it to my 4 cyl about a year ago, and it made a very noticeable increase in HP.
I determined that by driving up certain hills and making a note of where I had to down shift. With the larger throttle body I could go past all of these points, sometimes I wouldn't have to down shift at all.

Obviously though, it won't even come close to the power of the 6 cyl.
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post #12 of 34 Old 02-26-2007, 04:21 PM
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I have a 4 cyl. And am not complaining, too much. In a headwind at interstate speeds you can hang it up on passing or staying in 5th while going uphill, but for running around town and looking good, it's just fine.

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post #13 of 34 Old 02-26-2007, 04:48 PM
kenny kustom
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Quote:
Originally Posted by David K.
4 Banger lifted and 33's is prolly only 70HP @ the rear wheel. some guys lie to themselves saying that it is OK. That is terrible. Cost of regearing is close to the difference in just buying the 6.

I've got 120hp at the wheels with my 4 banger....
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post #14 of 34 Old 02-26-2007, 05:13 PM
rtingley
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I had a 2.8L in comanche and traded for my yj 4.0L the six is a hole lot better.No down shifting to pass.Never had it over 75 mph. or 2000rpm(normal driving). Plenty of pedal left !
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post #15 of 34 Old 02-26-2007, 05:15 PM
River Ryder
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Quote:
Originally Posted by kenny kustom
I've got 120hp at the wheels with my 4 banger....
How'd ya manage that one? There like 120 HPish to begin with before the 40% power loss through the drive train. Turbo or NOS? I so with I had a 4.0L

95 Rio Grande 4.0L conversion, T70, Electric Fan, Air Bag suspension, 4 link F/R, 1/2 ton dodge axles and 35x12.5 15. 4 wheel disc brakes. Frame Off restoration in progress. (so many pieces)

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