I have a tradition of sorts to take motion shots of every car I own, and this is a third BMW I've done this to. Get out into country side, get my buddy behind the wheel and snap pics on the side of the road.
in manual mode on shutter speed priority settings I think, have to check but it is a trial and error situation, playing with what feels right (like 1/50 for 30kmh speed). Then you get the right amount of blue and focus.
This is my old canon rebel xti dslr with kit lens. you can probably peek one up today for couple hundred euros or get much better high res newer comparable model for 2-3 times the price.