P76 Pistons.

**101RRS** · 10th March 2018, 09:24 PM

A query from a UK forum where a guy is rebuilding a 4.4 P76 engine out of a P76 and he has found one of the pistons is cracked.

Does anyone know if rover V8 pistons can be fitted to the P76 rods and used in the 4.4 litre engine?

He said "The Rover V8 piston is identical in size , but has a different crown design , so I thought that I would ask before starting to fit a set of RV8 pistons to the P76 rods. I'm thinking that a set of the low compression 8.13:1 Land Rovers pistons will leave me with the correct compression ratio for the P76 ."

Any advice I can pass on would be appreciated.

Thanks

Garry

**PLR** · 11th March 2018, 01:11 AM

Rover pins in Rover pistons the little end clearance would need checking for the piston type (8.13 , 9.35 narrow top ring ).

Rover pin .0041" smaller diameter than P76/Terrier from the books i have .

Earlier Rover ( 8.5 , 8.25 ) pins .0003" small dia than P76 , an 8.13 with the thick top ring may have the same pin size as these ( don`t have specs for 8.13 thick ).

**bee utey** · 11th March 2018, 08:13 AM

I fitted a new set of 8.13:1 thick ring Rover pistons to a P76 engine last year, no dimensional problems at all. The compression ends up at around 9.5:1 so it'll need premium fuel, otherwise it will be fine.

**101RRS** · 11th March 2018, 11:09 AM

Thanks to both of you for that great information - I have passed it on. So in addition to our Series 1s and early RR going back to the UK, it would seem our P76s are heading that way as well.

Garry

**350RRC** · 13th March 2018, 07:48 AM

There are a couple of references to piston alternatives (and a heap of other alternative parts) for 4.4's here:

http://www.leylandp76.com/technical/parts/partslist.pdf

cheers, DL

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