Quote:
Originally Posted by bvez3ro
The AMS also wrote, that the 1M has the same N54 Engine as the Z4 35is and a expensive forged crankshaft.
Thought the 1M had the same Engine like the 135i -> 1 Turbo and twinscroll.
Is the N54 better than the N55?
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The 1M has a tuned version of the N54. That engine is also used in the Z435is and 335is. 2 turbos on the N54, 1 turbo on the N55.