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D2 - Engine Bay Everything under the bonnet

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  #1  
Old 15th May 2009, 01:01 PM
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Hi guys,

Just a quick question, what is the difference between the 4.2 and the S8?

Not afraid of getting dirty with the car, just wanted to know what the fundamental differences were between the 2 engines......

Cheers

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  #2  
Old 15th May 2009, 01:14 PM
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Conan_the_Librarian Conan_the_Librarian is offline
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In a nutshell, for the pre facelift, higher compression ratio, different cams, different inlet manifold, reworked heads, different mapping, lower ratios in the transmission and final drive.
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1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex.
2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on.
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And a list of non VAG going back 40 years before I saw the light.
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Old 15th May 2009, 01:16 PM
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Pre Facelift A8 = 300 BHP
Facelift A8 = 310 BHP

Pre Facelift S8 = 340 BHP
Facelift S8 = 360 BHP

S8 also reves a lot more than the A8, 7250 ish not sure exactly, someone will be able to help more i'm sure!
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