Andrew Mawson wrote:


"Anthony" wrote in message
...
"jtaylor" wrote in
net.ca:


My dad's 63 190d had (from memory) a cr of 21:1. Are today's
diesel
engines any higher?


Yup. But, I am not sure of the exact number. The change to a special
steel
alloy was to prevent melting of the piston at the much increased
compression ratios.


--
Anthony


Steel pistons ? - that's a new one for me !

Looking at the caterpillar site their engines seem to have around 17-18:1
but they're also turbocharged.

AWEM

--
--John
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(was jclarke at eye bee em dot net)