[ROVERNET - UK] Rover P5 compression ratio and fuel

Eric Russell p6rovers at yahoo.com
Thu Aug 9 01:16:40 BST 2007

One of club members in eastern Washington state has
acquired a new (for him) 3 Litre Rover.  He has a
question about engine compression and fuel needs.  Can
you give him some idea?  I'll pass the answer along.

 Geoff Murgatroyd’s P5 could be a 7.5:1 or and 8.5:1
compression ratio car and I don’t know how to make the
determination.  Since this affects the type of
gasoline to use in the engine, it is something that I
need to know.

Question:  How does a person determine if a 3 Litre
engine has a 7.5:1 ratio or a 8.5:1 ratio?


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