The V8 Owners Forum -

That would appear to be a P6 engine but with a compression ratio not used in the uk. How much needs doing to the engine? it would be probably more cost effective to look for a later better spec engine, even 3.9's are going fairly cheap on e-bay now and in basic tune will give plenty of performance ...

I have a 1976 N. American specification MGB converted back to chrome bumpers and with a Rover V8 engine and system conversion, purchased just before moving to Oman. Now needs some work but I can't match the engine number to any engine model and year e.g. SD1, P5, P6 etc. Seller didn't know when or w...