This is from memory so I could easily be wrong. Most cars have a wider front than rear track. Usually not as much as the Insight but there usually is a small difference.
Not talking about modified (not stock) and this may not apply to high performance cars with wider tires in the rear than in the front.
I THINK (sometimes dangerous
) that it has something to do with the dynamics of thrust and if the thrust from the rear wheels in a RWD car is outside the front wheel track, then you can have handling issues.
Could (and probably is different dynamics in a FWD car, and there could be other reasons for the difference in front and rear track.
There have been cars with different wheelbases from one side to the other. One was a Renault. Again this is from memory so don't jump on me too hard if I am wrong.
regards
Mech