What Swiss racing driver won the 1971 Race of Champions? 
1971 Race of Champions: The 6th Race of Champions was a non-Championship motor race, run to Formula One rules, held on 21 March 1971 at Brands Hatch circuit in Kent, UK. 1971 Race of Champions:  The race was run over 50 laps of the circuit, and was won by Clay Regazzoni in a Ferrari 312B2. Clay Regazzoni: Gianclaudio Giuseppe Regazzoni (5 September 1939 – 15 December 2006), commonly called "Clay", was a Swiss racing driver.
Clay Regazzoni