Not 100% sure, although paddocks list them as different items, so I would think they are different.


Defender up to end of 200tdi 1992 = NTC9070,
Disco 200tdi = NTC8288

Unless yours is a conversion from a disco engine into a early defender.
 
When I swapped a Disco 200 into my 110 u used all the Disco pipework into the 110 steering box with no problems, so the pipes are interchangable. I've not removed the Disco PAS box yet but I will be keeping that for a spare.
 

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