Believe me i am no expert but..
I think the reason they are out of focus is you are running shutter priority at 1/200th at f4.8 or f5 which is not a problem but you have a very wet overcast day and are trying to use iso100, i think had you bumped it to say iso 200 or 400 you would have been alright. That way you could have kepted the shutter speed for the wheel blur but would have captured the car sharply.
Good effort though, it certainly takes a lot of practice, you seem to have the composition pretty good on them, just you were fighting what looks like really crud weather