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Originally Posted by dencoop
Are you sure about that logic...
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Yes, and I'll second what Technic said above.
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I am thinking the 640 should be the N54 engine like in the 740.
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N54 engine is going buh-bye. 640i is definitely getting the N55. In fact, it already has it:
http://www.bimmerfile.com/2010/11/19...ormance-boost/
I'll also add this: watch as the engines change for the F0x 7 series LCI next year. Are you willing to bet that the 740i/Li will either retain the N54 @ 320hp+, or revert to the N55 @ 300hp? If so, I'll definitely take that bet against you. Let me know and we can decide what's at stake here.
