Thank's guys, i know its a very old thread but as regards 200tdi FIP's its something i've been trying to ask and keep getting told they are both the same for a defender and disco 200tdi but they both have different part numbers which has always made me think they arn't and you have answered my question.
I am currently running a series 2a swb which i have fitted a defender 200tdi from a defender 90 i used to own but the timing case was damaged when i got the 90 where the alt and power steer bracket bolted to so i re-dressed the engine as a discovery engine but using the defender FIP but the engine seems to run out of puff a bit to quick for me and will only do 70 mph even though i have 3.54 diffs fitted, now i used to have another series 2a swb 200tdi that was fitted with a discovery 200tdi with std gearing and o/d and that would do between 80-85.
I've always suspected the FIP on this one as when i did the re-dressing i replaced the timing belt as well which means the timing belt is longer on the discovery engine so must have some effect on the defender FIP.