Video: 9 Days In Summer -- The Cosworth DFV V8 At The Source

By Winding Road Staff

July 10, 2018

9 Days in Summer is a 48-minute promotional documentary film made by Ford in 1967. It tells the story of the development of the Ford-funded Cosworth DFV and Lotus 49, the title coming from the nine Formula One races the car took part in 1967, which are also extensively featured in the film.

After the switch to 3 litre engines in 1966 Formula One season, many F1 teams such as Lotus that had previously been using Climax V8s, had to find new engines in order to be competitive. After an unsuccessful partnership with BRM and their heavy, unreliable H16 engine, Chapman persuaded Ford to fund the development of a new 3 litre V8 produced by Cosworth. The Ford Cosworth DFV was an innovative engine designed to form part of the chassis of the car, and went on to become the most successful engine in Formula 1 history amassing an incredible 155 wins from the late 1960's into the early '80s.

The film opens showing Cosworth designer Keith Duckworth silently working away at his drawing board, then cuts to footage of the 1967 Dutch Grand Prix. Jim Clark is shown winning the engine's début race. The rest, as they say, is history...