N52, and that's simply because of the added HP and the 6 speed auto transmission. Although, I might consider an M54 with a stick.
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1986 Delphin 528e - Roof rack equipped lumber hauler.
2008 Platinum-Beige X3 3.0si - Current project
2012 Alpine White X3 xDrive35i - My new snowmobile.
2020 Estoril Blue 440i xDrive cabrio w/MPPSK - This car is a blast to drive.
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