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AuthorTopic: Compression Ratio  (Read 9754 times)

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Offline Merlin

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Compression Ratio
« on: May 07, 2005, 20:38:57 »
How do you tell whether your C/R is 8:1 or 9:1.  Needing a years supply of new plugs from the Spring Adventure & the plugs are different for the 2 C/R's.--Cheers--Cogs
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1990 RR Vogue SE 3.9 EFI-Auto

Offline muddyweb

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Compression Ratio
« Reply #1 on: May 07, 2005, 20:54:13 »
It is often stamped on the block just next to the engine number.

(nearside, between the middle 2 pistons)
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Tim Burt
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Offline Range Rover Blues

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Compression Ratio
« Reply #2 on: May 08, 2005, 02:23:04 »
Not a cast-iron method of checking but the low compression engines used a dizzy with an external amplifier wheereas the HC engines had the amplifier on the outside of the dizzy body.
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Offline Merlin

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Compression Ratio
« Reply #3 on: May 08, 2005, 15:12:51 »
Sorted--9:1--found it on the block as Tim said.--Cheers all--Cogs
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