I dare say, I find an insufficient boot to be most bothersome. However, I rarely, if ever, stand in the back of my car, so I have no idea if the fit would be constrictive. The boot of my Austin 1800 will mostly likely accommodate several pairs of legs. I do find the working conditions under the bonnet in need of a good look. Best wishes in finding a suitable boot with which you may be able to tour most enjoyably. Ta-ta.