I once read an interview with james hunt which said he had more fun driveing his A35 van than anything else he'd ever driven.
due to its poor (skinny) tyres & brakes & little power meening he had to use all his skill to make it perform to its max.
i've owned a quite a few 'fast' cars but I used to have loads of fun in my old Fiat Uno 1.0 with a whopping 45bhp, that car was pushed to its limits (and sometimes beyond) just trying to keep up with modern traffic.