I have a 2022 400. The gauges read 75mph when RPM is 7000 RPM.
An odd observation on my part is this: At freeway speeds the RPM is a more accurate representation of MPH than the speedometer. This is based on comparison of MPH on the dash against the MPH that appears on three different GPS. Once I hit about 6000 RPM and not accelerating hard, 6000 rpm translates to 60 mph, 7000 rpm translates to 70 mph, etc., while the dash speedometer always displays that I am going faster than actual. I image this may change as the belt wears.
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