Compression devices were allowed for the first time since 1960, but it wasn't until 1977 that a company actually had the finance and interest of building one, when debuted their new Gordini V6 Turbo at the British Grand Prix at Silverstone that year. The appearance of the standard-produced DFV in 1967 made it possible for small manufacturers to join the series with a chassis designed in-house. Although a few manufacturers had been clamouring for bigger engines, the transition wasn't smooth and 1966 was a transitional year, with 2.0 L versions of the BRM and Coventry-Climax V8 engines being used by several entrants. Renault 1.5 litre turbo engineIn 1966, with sports cars capable of outrunning Formula 1 cars thanks to much larger and more powerful engines, the FIA increased engine capacity to 3.0 L atmospheric and 1.5 L compressed engines. The old 2.5 L formula had been retained for International Formula racing, but this didn't achieve much success until the introduction of the in Australia and New Zealand during the winter season, leaving the 1.5 L cars as the fastest single seaters in Europe during this time.
Although these were initially underpowered, five years later average power had increased by nearly 50% and lap times were better than in 1960.
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