Originally Posted by georgere
Well, perhaps due to the trend of the last sever decades. Also, F32 is not a new car per say-it is a 2-door version of already existing F30 model and traditionally BMW would introduce a new engine with the coupe release.
However what I think people are really hoping for (at least myself), is that Bmw builds a new engine based on N54 but reliable and more power out of the box. As far as N55 engine, I do not think people care about it that much, they need the new N54 sensation back.
Technically speaking, the N55 is more advanced than the N54...that engine is long gone once the 335is/135is/etc are out of prod.