Compression ratio for 4.2 - Audi Forum - Audi Forums for the A4, S4, TT, A3, A6 and more!

03-23-2011 | 10:21 AM

llaw

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From: edmonton

Compression ratio for 4.2

I have a 2006 a6 4.2, 335 hp (not FSI) wondering if anyone knows what the compression ratio is. I'm getting conflicting info. Some say 11 to1, some say 12.5 to 1. Thanks in advance.

03-23-2011 | 10:45 AM

mikeh

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From: Burlington, Ontario

Re: Compression ratio for 4.2

The compression ratio is 11:1

06-04-2011 | 10:06 AM

llaw

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From: edmonton

Re: Compression ratio for 4.2

Thanks...is the 2007 4.2 (FSI) the same or 12.5 to 1?

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