On a Rally course the Mini would have a chance, on a Road course NO chance at all.

BTW, the GT40 won Le-mans 4 years in a row and in one year(1969) took 1st, 2nd and 3rd. Top speed over 200 mph, average at Le Mans around 130-150, including curves.

As far as scale goes, look at it this way. At 5'3" sitting up straight her head would almost touch the roof. I have a co-worker with an old mini. I'm 6'3" and I can fit reasonably well without having to duck (much), granted most of my height is legs. I was amazed at how much room is inside one of those tiny little cars.

I try to make the cars look right with a standard vicky3 in the drivers seat or standing next to it, probably not exactly the most accurate way, but seems to work well in general.