- 1962 - 1963 - 1964 - 1965 - 1966 - 1967 In 1961 the engine capacity for Formula 1 was reduced to 1.5 liters. This put a premium on small light cars. Into the breach drove Lotus. The Lotus 25 was not the first racing car with a monocoque chassis but its aptistic simplicity and immense success in ...