I recently bought a new car and found that, basing upon the difference showed on my speedometer and the google maps displayed speed, it’s closer to 5% over actual speed until around 100km/h when it falls to a flat 5km/h over (tested up to around 130km/h displayed speed). All cars are calibrated to show higher speeds on speedometers than actual speed, but the variance isn’t always as high as 10%.
Yeah, all cars I drove consistently showed 10% over the actual speed I was going, when compared to GPS speed.
I recently bought a new car and found that, basing upon the difference showed on my speedometer and the google maps displayed speed, it’s closer to 5% over actual speed until around 100km/h when it falls to a flat 5km/h over (tested up to around 130km/h displayed speed). All cars are calibrated to show higher speeds on speedometers than actual speed, but the variance isn’t always as high as 10%.
Currently driving a 2025 Volvo EV which shows 1–2 km/h over actual speed at 40 km/h.
Yeah I was only driving analogue shit boxes from the 90s ;D