Now I've found an unbelievable quirk in this game. Wait for it. I got the US ROM of the game (owning both the original cartridge and the VC version I think I'm justified lol)... and the speedometer actually shows higher speeds! Accelerating normally on the PAL version your vehicle will top out at about 700km/h, on the NTSC version its about 850! I think this is because the timer on the PAL version is fixed and actually runs in real time so when calculating the speed in every frame it knows it is going slower. Immense