This might be true for a fixed power output. But as you acknowledge, idiots (enthusiasts) means larger engines =more noise. That said, We don’t have to specify

This might be true for a fixed power output. But as you acknowledge, idiots (enthusiasts) means larger engines =more noise. That said, We don’t have to specify the means to reduce noise … just set the limit and let people comply how they want. But a large engine is a probably dead weight given the range of reasonable speeds in residential areas or off of a motorway.