Personally, I would see that it would make the most sense to describe power in a chart. Everyone who drives a shimano motor knows that less than 40 revolutions per minute is not much power available, even if, according to that chart, it would be in the best range then.
The sad side here is that this works with engine code. My engine was replaced under warranty and this purchased premium no longer works. For some reason, I imagined this to be bicycle specific but this is engine specific