Cosworth DFV
The 1967 Cosworth DFV F1 engine, a NA 3.0-liter V8 producing appr. at 9,000 rpm (101.9 kW/liter), featured four valves per cylinder. For many years it was the dominant engine in Formula One, and it was also used in other categories, including CART, Formula 3000 and Sportscar racing.