Quote:
Originally Posted by Jamesons Viggen
"See what is missing in the above list? The difference in the 320i and the 328i is the pistons. While both have a 10:1 compression ratio the 320i has a different part numbers for the pistons then the 328i."
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I've read that thread too.
The way it looks from what I can research. The 328 N20 and N26 made prior to 11/12 have the same pistons with part no. 11257618811. That part has now "Ended" and the only current part that is shown is listed under the 320 N20 configuration, part no. 11257640168. I'm assuming that 328 engines made after 11/12 is made with the new piston/engine configuration using the same pistons in the 320.
That said, I could be wrong and possibly someone who works at BMW could confirm part numbers.