I've read mags testing a loaded X128i xdrive and achieve 0-60 times of 6 flat. That's not a lot slower than the 428i. Also, what rear end gear does each use? The rear gear makes a ridiculous difference in acceleration.
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2011 E91
2016 M2 - Sold
2014 X1 - Sold
2002 Land Rover Discovery II - 3" lift & 33s
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