Did this some time ago on a small scale.  Doing it again 3' by 4': Basics in acrylic and now switching to oils.

Almost done with this one.

Here's how it ended up after multiple additions.  It's a night race and a frame from a dream.  I've never drawn a real race car and do not even know if they have headlights.
 The size is 3 ft x 4 ft.