Can't you read what the OP posted on here, the title of this thread is M3 vs E55 AMG...Which is faster?
I can tell you from my experience, I have own both cars W211 E55 and W211 E63 these two AMG's will beat a E92 M3 on a straight line period. I also own a DCT E92 M3 with bolt on parts and my E63 AMG is still a beast
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The answer to this question: E55 AMG wins.