I'm really confused by the engine. I thought everything was going to the B58 inline 6, why did they come out with a new variant of the N55 for the X4? And why didn't this N55 variant make it into the 340i? Maybe I'm crazy, but I would have thought that all X40i models (x as number holder, not the x line) would share the same engine moving forward.
So if they make an M340i will it be a souped up B58, or this new N55?
Brain fried.
