Quote:
Originally Posted by clarence
The only explanation I can think of is that they bin the engines according to wht they can achieve on the factory testbench after assembly.
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Not likely. By that line of reasoning, BMW would be throwing out a significant portion of their current engine manufacturing cycle because they were unable to attain the specified power output. There simply isn't that much variation in manufacturing these days. We (humans) are too good at it.
Any differences in the engine are intentional and introduced by specification.