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Old 04-11-2008, 07:35 PM   #1
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Exclamation Inline 6 vs V6

Hey guys,

New to the forum and am in the market to buy a jeep, my first.

Have heard a lot of good things about them, but was wondering what u previous owners think of the new V6, compared to the older style inline 6.

Like I said, im looking to buy a jeep in the next few months and want one that will last a long time. New jeeps looks nice b/c of lifetime warranty, but i have some friends that told me that the inline 6 engine work better than the V6.

any info would help. thanks.

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Old 04-11-2008, 07:47 PM   #2
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the 4.0 I6 goes back to 1990, and is built on the platform from the 258 4.2 motor before that goes back to at least the 70's. it has a huge following, and most who have one love it, i love that motor. the v6 came out of the chrysler minivan. its a decent motor, but more geared toward daily driving, little better horse, not as torquey as the I6. more emissions and electronics on new engine, can't go wrong w/ I6

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Old 04-12-2008, 03:34 PM   #3
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Unfortunatly the strait 6 doesnt come in the JK which is frankly a nicer Jeep....

Everytime I get in a TJ at work now I feel cramped uncomfortable and somehow less than impressed...and I used ta love em...I pull over 19MPG outta my JK....and power has not been an issue off road...it climbs what I wanna climb....drive em back ta back and make the call based on what fits your needs.....its hard to go wrong both motors are proven reliable workhorses...Gary
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Old 04-12-2008, 06:43 PM   #4
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the 4.0 I6 goes back to 1990, and is built on the platform from the 258 4.2 motor before that goes back to at least the 70's.
If you wanna talk history... AMC introduced it's first straigh-6 engine back in 1958... so the history is the I-6 is a very strong and complicated one. The "modern-era" 4.0L started out in 1986. The 199, 232, 242, and 258 are all very similar to each other.

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Old 04-12-2008, 07:27 PM   #5
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The I6 is a better engine. I was talking to a salesman at the Dover Dodge Used Car Center (for those of you from North Jersey, you know where I'm talking about).

This salesman has been to all the Jeep Jamborees and driven Jeeps for the past 35yrs. I was told by him that Chrystler took the I6 off the market because they were not breaking down, and customers were getting an average of 180k miles out of them. It is because of the high quality or that engine that it was replaced with the damn minivan motor.

In my opinion, a V6 has no place in a Jeep.

It aggravates the hell out of me when a corporation changes their agenda to suit themselves, rather than please thousands upon thousands of customers.

I will never own a Wrangler newer than an '06. Even if they brought back the I6, I'd still never buy a newer one because of that JK body style and interior. A Wrangler is a Wrangler, not a luxury SUV.

Power windows? Concave windshield? Short, stubby grille? 3.7ltr V6?

What the hell were they thinking?

/rant
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Old 04-12-2008, 07:35 PM   #6
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If you wanna talk history... AMC introduced it's first straigh-6 engine back in 1958... so the history is the I-6 is a very strong and complicated one. The "modern-era" 4.0L started out in 1986. The 199, 232, 242, and 258 are all very similar to each other.

*end of hijacking*
imo most people aren't familiar w/ 199 and 232 engines. i agree about the straight six, great designs, all cast iron, no aluminum. great engines. can't have that.
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Old 04-12-2008, 07:45 PM   #7
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True, most people don't know of them, but yes they were ALL good motors.
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Old 04-12-2008, 10:20 PM   #8
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The 3.8 is okay but the 4.0 is better for the application. I would love to see them put a 4.0 in a jk but don't think that will happen.


The 4.0 rocks!!! Go 4.0
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Old 04-13-2008, 10:59 AM   #9
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Originally Posted by The_YJGuy88 View Post
The I6 is a better engine. I was talking to a salesman at the Dover Dodge Used Car Center (for those of you from North Jersey, you know where I'm talking about).

This salesman has been to all the Jeep Jamborees and driven Jeeps for the past 35yrs. I was told by him that Chrystler took the I6 off the market because they were not breaking down, and customers were getting an average of 180k miles out of them. It is because of the high quality or that engine that it was replaced with the damn minivan motor.

In my opinion, a V6 has no place in a Jeep.

It aggravates the hell out of me when a corporation changes their agenda to suit themselves, rather than please thousands upon thousands of customers.

I will never own a Wrangler newer than an '06. Even if they brought back the I6, I'd still never buy a newer one because of that JK body style and interior. A Wrangler is a Wrangler, not a luxury SUV.

Power windows? Concave windshield? Short, stubby grille? 3.7ltr V6?

What the hell were they thinking?

/rant
Its a 3.8 for starters....try and keep up....

and Im sure those guys with the vintage CJs with V6s would prob disagree about wether they belong in em
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Old 04-13-2008, 11:03 AM   #10
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Its a 3.8 for starters....try and keep up....

and Im sure those guys with the vintage CJs with V6s would prob disagree about wether they belong in em
Prolly was a typo...

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Old 04-13-2008, 01:41 PM   #11
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V6 engines.. lighter and high rpm friendly.. more high end hp but less low end torque
I6 is the opposite. Heavier but low end friendly, more low end torque but less high end hp.

V6 tend to get better mpg than I6s
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Old 04-13-2008, 02:04 PM   #12
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V6 engines.. lighter and high rpm friendly.. more high end hp but less low end torque
I6 is the opposite. Heavier but low end friendly, more low end torque but less high end hp.

V6 tend to get better mpg than I6s
When you are talking only about these 2 engines, your statement is true. However not all I6 are like the 4.0 and not all V6s are like the 3.8. All you have to do is look at the BMW I6s and the I6s that toyota used in the Supra, both are made for higher revs than our 4.0. It has nothing to do with the cylinder configuration and everything to do with stroke length (and resulting piston speed) as well as pushrods vs. overhead cams. With that said, I think Jeep made a huge mistake when they made the JK, they are heading in a direction that caters to the Yuppy posers. Wrangler is not a luxury SUV.
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Old 04-13-2008, 04:09 PM   #13
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Yea it's all about stroke and bore. A shorter stroke will rev alot higher than a really long stroke. Also valve train weather it's sohc,dohc or a push rod set up it alll is in the configiration.
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Old 04-13-2008, 04:15 PM   #14
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When you are talking only about these 2 engines, your statement is true.
My bad i didn't make it clear but i thought since we are in a wrangler forum and talking about the engines wranglers came with that was enough...

Anyhow i think the reason why the V6s now in wranglers have short stroke (less low end torque) is because fuel economy is starting to be very big.
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Old 04-13-2008, 05:24 PM   #15
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yep, fuel economy and i gotta agree w/ parrot head to, they are just more pavement friendly. every time they change, they become more carlike and road friendlier, some parts are better, but also further from jeep.
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Old 04-13-2008, 05:53 PM   #16
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Originally Posted by The_YJGuy88 View Post
The I6 is a better engine. I was talking to a salesman at the Dover Dodge Used Car Center (for those of you from North Jersey, you know where I'm talking about).

This salesman has been to all the Jeep Jamborees and driven Jeeps for the past 35yrs. I was told by him that Chrystler took the I6 off the market because they were not breaking down, and customers were getting an average of 180k miles out of them. It is because of the high quality or that engine that it was replaced with the damn minivan motor.

In my opinion, a V6 has no place in a Jeep.

It aggravates the hell out of me when a corporation changes their agenda to suit themselves, rather than please thousands upon thousands of customers.

I will never own a Wrangler newer than an '06. Even if they brought back the I6, I'd still never buy a newer one because of that JK body style and interior. A Wrangler is a Wrangler, not a luxury SUV.

Power windows? Concave windshield? Short, stubby grille? 3.7ltr V6?

What the hell were they thinking?

/rant
That is just the opinion of a car sales man! cant really speak for the manufacture!
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Old 04-13-2008, 06:38 PM   #17
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yep, fuel economy and i gotta agree w/ parrot head to, they are just more pavement friendly. every time they change, they become more carlike and road friendlier, some parts are better, but also further from jeep.
Ya I must agree It's because it's better for every day driving.
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Old 04-13-2008, 08:14 PM   #18
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That is just the opinion of a car sales man! cant really speak for the manufacture!
Its common sense. Working for Jeep as long as he had, I'm sure he knows more about it than us.
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Old 04-13-2008, 08:18 PM   #19
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Its a 3.8 for starters....try and keep up....

and Im sure those guys with the vintage CJs with V6s would prob disagree about wether they belong in em
Gee, thanks for the sarcasm, it was just a typo. I was thinking of the Liberty.

And for those who want to swap in a V6, fine, go ahead.

The company put an I6 in there for a reason. Why change your agenda for something that has has never come in a factory Jeep and trash the tried and true performance of the I6?

Its a lame attempt on Jeep's part to make more money.
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Old 04-14-2008, 08:00 AM   #20
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The company put an I6 in there for a reason. Why change your agenda for something that has has never come in a factory Jeep and trash the tried and true performance of the I6?
Jeeps came with V6's from the factory before they ever came with the I6. The I6 was first put in a CJ when American Motors bought the Jeep Corporation (from Kaiser, I think). Before AMC bought them, Jeep CJ5's came either with an I4 or an optional Buick V6. AMC was not going to use a Buick motor in the Jeep so they put in their own I6. They had to lengthen the front end a few inches to get the straight 6 to fit. At the time, Jeepers with the V6 Jeeps thought the I6 was a big mistake.

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Old 04-14-2008, 08:06 AM   #21
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I believe that v6 had a longer stroke than the 3.8 soccer van engine.
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Old 04-14-2008, 12:47 PM   #22
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Gee, thanks for the sarcasm, it was just a typo. I was thinking of the Liberty.

And for those who want to swap in a V6, fine, go ahead.

The company put an I6 in there for a reason. Why change your agenda for something that has has never come in a factory Jeep and trash the tried and true performance of the I6?

Its a lame attempt on Jeep's part to make more money.
No sarcasim just fact.....If you wish to speak about a subject like you know something about it it a good idea to know something about it.

The V6 is in the current Jeep for one major reason.....Emissions....thats pretty much it....it was to costly to make the 4.0 compliant...thats strait from the class we took when the new JK was introduced....

as for Jeep making money....THANK FREAKIN GOD WE HAVE A HIT FOR A CHANGE!!!!....it ensures my continued employment and the welfare of my family.....get over yourself no ones makin you buy one....Gary
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Old 04-14-2008, 01:50 PM   #23
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Sorry

I have to call BS.

Quote:
The I6 is a better engine. I was talking to a salesman at the Dover Dodge Used Car Center (for those of you from North Jersey, you know where I'm talking about).

This salesman has been to all the Jeep Jamborees and driven Jeeps for the past 35yrs. I was told by him that Chrystler took the I6 off the market because they were not breaking down, and customers were getting an average of 180k miles out of them. It is because of the high quality or that engine that it was replaced with the damn minivan motor.

In my opinion, a V6 has no place in a Jeep.
So let me get this straight.

Jeep offers an unlimited mileage warranty on there engines...

and then put an engine in there that won't last as long to max profit... uh.. ya.

Truth to be told they probably are just saving cash by producing 400,000 of the engines a year, as compared to making 200k each of two motors.
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Old 04-14-2008, 05:03 PM   #24
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I have to call BS.

So let me get this straight.

Jeep offers an unlimited mileage warranty on there engines...

and then put an engine in there that won't last as long to max profit... uh.. ya.

Truth to be told they probably are just saving cash by producing 400,000 of the engines a year, as compared to making 200k each of two motors.

Ding Ding Ding, we have a winner. There's no way they were going to continue making the I6 for one and only one application. Even when it's the only product line that continually makes them a profit. You could see the decline of the I6 as soon as they took them out of the Cherokee's.

I've wheeled both, I've raced both and I've had my doors blown off by the 3.8. It's turning out to be a solid motor. Yes the torque curve is a little higher, but for the best of both worlds it's a great engine. Good power off the pedal and still can pull some very nice MPG numbers for a rolling brick of a Wrangler.

I wouldn't be surprised if you see the 4.0 V6 that they have in aother product line make it into a Wrangler in the next couple years. It's all about being able to mix the product lines and only have to tool one motor for multiple vehicles even if they make some changes for HP. It will also perpetuate the continued existence of the Wrangler by doing this. Why do you think the TJ's front suspension is an exact clone of the XJ and ZJ?

Take my comments for what they are, those of you that drive a JK will always back that and those that have only messed with I6's will only back that. But mine are real world comments from someone that has wheeled both in very capable applications.
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Old 04-14-2008, 05:08 PM   #25
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I wouldn't be surprised if you see the 4.0 V6 that they have in aother product line make it into a Wrangler in the next couple years.
What i'm hoping to see is diesel Jeeps for sale here in the us. Perhaps maybe even turbo diesel
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Old 04-14-2008, 05:19 PM   #26
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What i'm hoping to see is diesel Jeeps for sale here in the us. Perhaps maybe even turbo diesel
I wouldn't be surprised either Trip. Especially in the 4 door.
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Old 04-14-2008, 05:26 PM   #27
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I've been wheeling with the JK's, that V6 is does just fine and they didn't have to use high RPM's to get it done. It is a better vehicle than the TJ.
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Old 04-14-2008, 06:08 PM   #28
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I must say that at first i didn't like the jk but it has really grown on me. Jeep did a good job on it.
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Old 04-14-2008, 06:10 PM   #29
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is it just me or doesn't anyone else think the buick v6 sucked. i've driven it, and it was worse than the 4 banger, and it had a crap load of problems.

in my experience the 4.0 is pretty easy on emissions, especially for how long it has been around. i've seen them pass emissions on the im 240 w/ a cat that was half gone. i wouldn't buy into whatever daimler tells you about that motor. i think blkjp is closer. it isn't cuz the 4.0 was too good, its just business, and jeep has to continue to offer what the buyers want, a more pavement friendly engine, and do what makes most business sense.

emissions is just a pacifier excuse,

and the 3.8 has been a solid motor in the minivan, does great off the line. but i wouldn't own a jeep w/ a mini van motor
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Old 04-14-2008, 06:14 PM   #30
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That 215 wasn't a bad V6. It had it's problems, but Land rover was successfully using it into the earlier 90's. It's a great lightweight V6 that can make some pretty decent power in the middle of it's band.

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