I fitted a defender 200 tdi into the 90 when i got it as the old 2.5 na was gutless, but had a bad run wi that 200 so got a disco 200tdi to fit, went in easy enough, if i had to do it all again i wouldnt hesitate, helped a mate fit out his series 3 109 a while back wi a disco 200tdi also and was equally as easy, now my mates dad is considering buying my 200 for his lightweight project, so will probably end up on that fitting too, but now iv succom to the call of the V8 iv got a slightly more complicated fitting to do. I wouldnt call myself overly competent with engines but the first 200tdi fitting was my first engine swap and have never found it difficult yet.