Hemi JK from the factory may not be too far off.

editorial.autos.msn.com/article.aspx?cp-documentid=1183497

Neither is a diesel JK

http://www.leftlanenews.com/jeep-to-...-s-canada.html

 

they way things are going diesle will b freaking cheaper than gas

 

Im more interested in the diesel over the hemi. Yeah the hemi has more torque and hp over the current engine, but im not looking to gain all that at such a higher gas consumption rate.

 

2013 is to late for me, i will be trading the jeep next year, if there is no diesel wrangler then i wont be buying another jeep for a while.

 

It's not much worse than the V6 actually. A lot of people are seeing about 1 mpg drop. Obviously not as good as the diesel though.

 

My feeling has always been that with an under powered engine you work it more which in turn burns more gas. With a Hemi in a JK in manual form anyways you could lug it around in 6th gear more because you have all that torque to work with and there for get the same if not maybe better mileage than with a V6.

 

In the old days yes, you are right. But with all the new Bio Diesel technology adding usualy 7,000 to 11,000 dollars to the vehicles sticker price alone, and the cost of todays' diesel at the station, it is really not worth it. Plus with the new technology with the DPF filters and their issues alone, will drive you crazy. Just not worth it, a lot has changed with the entire diesel world, not the same beast you can work on your self , like the old days.
I was a diesel dude myself, I just had enough of the new emission's crap, constantly breaking down. If that is not enough diesels do not get anywhere near what they use to get compared to 7 years or more ago. Those were the days a diesel engine was worth every penny. Now Ford requires to use Urea in the seperate tank next to the gas tank, to be able to pass emissions,,, Seriously, it is getting to be a bit too much with this emission Bull ...it is all a big money maker. If you start to delete the DPF Filters and other stuff that goes along with it, you will have serious issues with any warranty claims , way worse than what we go through with our JK's.

I Personaly feel the Hemi with the displacement system would be the best bet, The HEMI Engine has been around and proven itself for the long term, which is important , than developing another new engine that has no history, which is taking chances of having fututre issues like Ford's new Diesel Engine in their SUPER DUTY Pickups, constant issue , day to day in the shop They would need to install a bypass system with a switch for those times when you want the full hemi power, thus shutting off the displacement engine feature, like the Challenger, no displacement at all in that sports car.

My 2 Cents 4 Free