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Originally Posted by cstavaru
I don't think BMW has the technology right now for fuel efficient 400hp engines (on their standards) for use in non-M cars. That's why they go hybrid. They will add the power via electric engines.
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Maybe not 400hp, but that is the rumor. Keep in mind that there are very fuel efficient 2.0L I4 engines from a number of manufacturers that can hit 133hp/L. There's no reason an I6 could not do the same.
Hybrids are neat but they add appreciable weight. Not good.
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I am very curious if BMW uses Valvetronic on their next M3.
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I think that all future BMW engines will use Valvetronic. The N13, N20, N55, N63tu, S63tu and N74 all do.