2.8 IH, 300 TDI, TD5 and V* gassers
Being an owner of a 300, a TD5, a 5.0 Rover and had in the past 3.5's though 4.0's I can say I will do whatever I can to go Diesel in the future.
I love my 300 for it's simplicity but a VVT would do well on it (and soon will
)It's underpowered and get's even more so each time I add a new do dad to the truck (weight) It could really use a lower first gear. Off road it's the same problem, with a 1.4 transfer case that nive 3.2:1 Low range is compromised, they would have done better sticking 4.1's in the diffs or better yet my plan is 4.88's and a 1:1 transfer case.
The TD5 is a hoot to drive and the electronic engine control is actually less complicated than the V8. It will run with all the sensors failed with exception of the CPS. I simple Hall effect sensor that is very similar (could be interchanged with) the Gems. I think it's a great "modern" engine that has tons of potential. When comparing my 300 to the two TD5 110's I've driven I get jealous.
2.8 IH, I've heard too many stories of problems, overheating is the biggest one that would concern me as I can get the 300 to "warm up" hauling a heavy load on a steep incline. That should be resolved by the weekend but it makes me wonder about the 2.8, I have to think that the VVT is what makes the motor, sure a 12% increase in capacity and a bit of a better head makes for about a 12% increase in power but we can do that with the 300.
The biggest benefit of the diesel in the Disco has been getting to actually see the odometer go well past 550 miles before it was time to put fuel in it! Plus it still outperforms the V8's in the mountains.