The leaf under reports your speed consistently by 10 percent
So most drives think they are doing 100km but are only doing 90
This is true for all cars:
In case you don't want to read the whole article....
The most important thing to bear in mind, first and foremost, is that speedometers in most vehicles are designed to overestimate the speed of travel.
AA Motoring Affairs expert Mark Stockdale explains.
“International law has long required modern cars to overstate true speed. The applicable standard for most vehicles sold in NZ is a European standard that specifies that speedometers must not indicate a speed less than the vehicle’s true speed, or a speed greater than the vehicle’s true speed by an amount of more than 10 percent plus 4 km/h.”
What does this mean in real driving terms?
Well, another way to look at it is, at an indicated speed of 100km/h, the vehicle's true speed must be between 87.3 km/h and 100km/h.
Yes most cars have some form or over reporting but its usually in low single digit percentages but the Leaf Always is 10% more.. ( by design it seems )