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      12-27-2012, 11:07 PM   #15
Chariotrider
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Drives: 2013 X328i
Join Date: Sep 2012
Location: USA

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Yes at an idle, with the window rolled down, it does sound a little like a diesel. The minute you are off idle, the sound disappears. I am sure this is due to the ~11:1 compression ratio.

I would not let this scare you away as I cannot say enough good things about this little motor. There are several post on how BMW underrates the HP & Torque of their motors and I believe it. The N20 will keep up with a lot of V6s out on the market and getting great fuel economy while doing it. My wife consistently gets 26 mpg in mixed driving condition in comfort mode.

If you are looking for a great sounding BMW motor, the N20 is probably not for you. I myself prefer to keep the noise outside the car
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