Watch a historic Mini Cooper S dice it up with V8 Mustangs (roadandtrack.com) [ame="https://www.youtube.com/watch?v=t3ppTh3TYtA"]Endaf Owens Historic Mini cooper S at Silverstone classic 2013 masters - YouTube[/ame]
The photo below is from contemporary historic racing, but back when the Cooper S was first introduced, it was racing on tighter tracks than Silverstone against the Ford Galaxie 500 - real David and Goliath stuff.