Wasn't there a recent comparo where the N54 was a hair faster to 60...and in the quarter mile...but the N55 ran away from the N54 from 100 to 140.
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Originally Posted by Iceberg3
Having gone from a 2010 E92 auto to a 2011 E92 6MT, I will admit that (based solely on my experiences with both) that the N55 doesn't feel as fast as the 2010 N54 I owned. The N55 "feels" like it runs out of breath at the top and takes longer to get up to speed, while the N54 felt fast immediately and all around. It may only appear this way because the Valvetronic makes this motor so smooth that it feels like it has much less power. IMO the new motor feels slightly more laggy when at lower speeds. Even though I wish the single turbo was a little bigger (GT35R maybe), a larger size would provide greater lag.
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