JEEP= Hellcat (gas) or Baby Cummings (diesel). Both are non CARB compliant, and both in the $15K range to swap. Both are in a
niche market, for the privileged few with that type of cash hanging around. The new Range Rover, is still too new to get a feel for them. If we add cars to the mix, the market opens slightly in the USA, but most here will look for either a truck or a SUV platform of sorts with AWD or 4x4 in it.
The closest is the new again baby fiat diesel in the Jeeps, and I have yet to see a lot of info by users of them. Jeep people seem to be wanting ...right now, at least, more...POWER/TORQUE over slower put-put diesel offering from the OEM. Again,...........just my opinion. If there is enough interest, i am sure the moderators will open a new thread post on the subject.
The guys/gals down under seem to have the best selection and choice when it comes to this question.
Heavy use off-roader's seem to prefer diesels due to better mileage numbers. and distances covered.
I just used the GM/Ford brands as they offer either gas or diesel in the same body style trucks in their class.