That solar car is exellent example lets use it with the template:
Sad there is not clear picture the roof head cover at their pages, but with quick tilt of the picture is fills the template form pretty nicely to my eye.
Coincident? I dont think so. If you have time and find better pictures that test is pretty easy to do be anyone. If the most aerodynamically efficient test cars use the template where they can what is the reason if not lowest drag?.
Other forms are dictated by the need to have surface area to those panels. also the covers for wheels are probably designed with that teardrop shape. That solarpanel shape creates more skin friction as is not best but its needed.
Do also notice that not all pictures are in correct proportions what you find in the internet. If you take close picture of some part and try to model it same with your computer there will come errors depending on the lense that was used how ball shaped it is. Trust me I have tried.
Form follows function.