more importantly, the difference between later 2.3 and 2.2t crank shafts. also any difference between the 10v and 20v? why the 20v can spin at 8k while 10v tops out at 6500, only because of the head/flow?

I know earlier 5 cylinders have different strokes thus the crank is different, but is there a difference in quality, material, and workmanship?

just wondering because 5 bangers mostly have rod failures, not many crank/bearing failures.

The early turbo cars, like the MC-1, have different bearing sizes.

4v vs 2v is just head flow AFAIK. Having had both apart, that is my observation.