Thread: N54 vs N55
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      11-22-2009, 09:58 PM   #22
RPM90
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Drives: 340i M-sport AT
Join Date: Mar 2006
Location: Chicago

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The N55 is in the new 535i GT, the beastly looking Suvagensedan. It's a cross of SUV, wagon, and sedan, and pretty FUGLY, to me anyway.

The bright spot is the new N55 engine.
3.0 inline 6 with valvetronic and a twin scroll turbo, one of them.
Improved power band, better MPG.
Cheaper to make?
I doubt it. Valvetronic is ultra high tech, and a twin scroll is an advanced turbo design that uses a more sophisticated manifold design.

RUMOR has it that this design, if not the whole engine, will make it's way into the next 1 and 3 and 5. It meets new tightened emissions standards.
More RUMOR has it that the 1 and possibly 3 will see weight reductions as well to help meet EPA standards as well.
Can't be too bad when you get better power to weight, lighter weight for better handling, and a broader/high rpm power band.
Sounds quite positive.
But, like all things rumor, there may be some truth, but where, is the question.
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