>>28524202Cross multiplication. It's not perfectly accurate.
I look up the official measure, get a side picture of a car, measure the distance from the wheel centers in pixels, calculate what a different wheelbase would be in pixels.
For example, for the 190 I had a length goal, so I looked the official length (4420mm), measured the total length of the car in the picture (1120 pixels), the kei car max length is 3400mm which in pixels would be 3400mm x 1120px / 4420mm = 862px.
Or for your wheelbase, the distance you gave it between the wheel centers is about 501 pixels: 501 x 4420 / 1120 ~= 1978mm. Very rough approximations. If we worked with very high resolution pictures it would be more accurate.