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      06-12-2013, 04:21 PM   #40
mkoesel
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Drives: No BMW for now
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Quote:
Originally Posted by Holander View Post
Yeap, S54 are ironblock engine and S65 aluminium, but new S55 will be magnesium aluminium so hugely lighter than S54 and probably lighter than S65.
Will it? Both the N54 and N55 have aluminum blocks. The N52 and N53 use a magnesium/aluminum alloy for the block, but to date no turbocharged engine from BMW has. It would be great if the S55 changes that, but I have my doubts.
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