Is the speed of my 2021 Prius factory-limited? (My 2005 Prius hit the speed-limiter wall at 106 mph, I first discovered on a vast straight stretch in Alaska. The vehicle had good stability at that speed, and the motor had a good bit more ability to go faster.)
MG2 rpm limit does indeed seem to be what determines the speed limit for G1, G2, and G4/G5 PHEV Priuses - all less than 180km/h. But for other Priuses it's set at 180km/h = 112mph, which I believe is pretty standard across the whole Toyota range. (And possibly for Japanese cars more widely). That does roughly coincide with what I understand to be the MG2 limit for G3 and G4 HEV, but it's lower than the G5 HEV rev limits suggest.
