The motion is there but It would have been more exaggerated it there where some figures or objects in the background. The uniform grass and street soften the motion. Great shots
The second shot (white car) seems to be the better of the two as you can almost read the text on the intake... it almost looks OOF (?). I guess I would try manual focus with a variety of apertures just to see if that made any difference. A good technique ...
I remember using a Minolta SRT 100b at that time with manual focus but also actual films and no digital. The challenge was to manage to get a reasonable ratio of good ones as I could not afford to put too many in the garbage as I was a student and the fil...