Anyone with a problem with how the thread is handled should have had the foresight to create it first and to their liking.
I personally think it's unreasonable to dictate that cars be modified for increased power output when not all cars can be modified in this way to the same extent, but it's not my thread.
I personally think it's silly to dictate that cars should be modified for increased power output when the default gear ratios were, in many if not most instances, selected to make use of the power available in an unmodified state, but it's not my thread.
I don't think the unit of measure is really that big a deal when compared to these decisions, especially when it's a matter of simply multiplying mph by 1.61 to get km/h or multiplying km/h by .62 to get mph.