9 Days In Summer is a documentary created by Ford in 1967-68, the film covered the development and subsequent successes of the Ford Cosworth DFV V8 and the Lotus 49 – a pairing that would go on to win the world championship in 1968 and 1970. The 3 litre Ford Cosworth DFV V8 would become the most successful engine in Formula 1 history – amassing a total of 155 wins in Grand Prix racing over the course of its life.
Watch the full film above or read more about it here via IMDB.3
via SILODROME