Ken Tyrrell
By 1971, the 3-litre era was now into its fifth season; it was also the year when sponsorship came to the fore. Ken Tyrrell became a constructor and Jackie Stewart won at Silverstone driving the Tyrrell 003 on his way to a second World Championship. Ronnie Peterson was second in March 711 from Emerson Fittipaldi in Lotus 72D; all were Cosworth-powered in what fast becoming Formula Super Ford; the race average was 130.5 mph.