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Re:Why are semi trucks in the US and Europe so different? (2... by SkyPuncher on Thursday February 03, 2022 @11:57AM (#30194957)
Ah. Yes! I forget about this!

In vehicles, there's a lot of additional, interesting factors at play - like engine efficiency.

Re:Why are semi trucks in the US and Europe so different? (2... by colechristensen on Thursday February 03, 2022 @12:09PM (#30195136)
Yes there will be many nonlinear factors which combine to a maximum efficiency speed, which can, to an extent, be chosen by design.