[QUOTE=Timo_90xj;10161573]Naaahh, skip the heavy pigs like V8 GM diesels or Cummins 4bt, and put in an old Merc diesel (OM603/606, or even a 617). XJ is light vehicle, so you can easily use passenger car engines. The old merc diesels are all pretty durable and tunable engines. Stock turbo internals of a 603 or 606 should handle up to about 300hp. Stock engines aren't that powerful, but rather spectacular when built right
Don't know about their street-legality in the USA though.
As I said in my previous comment, my other car is an 83 Mercedes with the 5 cylinder turbo diesel. It's not a light engine but I don't know how close it is to the Jeep engine in weight. If you want to look into tuning one check on PeachParts - Mercedes Parts & Tech Info
The first car in your videos has an amazing engine in it. I will look around, I have seen pic. of the engine and the build up of the car.