Join Date: Dec 2002
Location: NJ / FL
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Re: 4 cylinder vs 6 cylinder YJ
This is easy. Go with the 6.
Its not as simple to think..."Oh less cylinders gets better gas mileage." It doesnt always work that way.
If that little 4 banger has to work its wimpy tail off to move that Jeep, it will do roughly the same MPGs as a 4.0 thats leisurely along for the ride.
The 4.0 is a legendary motor, known for reliability, good low RPM torque, and a fairly strong aftermarket following. Its resale value is also much higher.
A Jeep is a heavy vehicle with the aerodynamics of a barn. A 4cyl might work great in a Geo, but its got no place in a 3500lb 4x4.
The only possible argument I could see for the 4cyl...is that it would come with 4.10 gears....but thats really not an issue anyway...since the YJ NEVER came with a D44 option.
I have personal experience driving a 4 cyl bone stock 5speed YJ. It was a turd. Granted, I've never owned anything with less than 318cid, but I know that it was dangerously slow, especially on hilly freeways or when trying to merge into traffic.
Go with the 4.0!