In some ways March 6, 1981 was a typical day at Silverstone: it rained. In other ways it was an historic occasion.
On that date the McLaren MP4-1 was unveiled at the famous British track. The designation was taken from Marlboro, then major sponsors, and Project Four, the company run by a former Brabham mechanic called Ron Dennis.
This was the first fruit of the new McLaren International partnership that brought together Dennis and technical wizard John Barnard. It was also Formula 1’s first carbon fibre monocoque.