The Cosworth DFV (Double Four Valve) is a renowned V8 engine designed for Formula One racing, first introduced in 1967. It was developed by Cosworth, a British engineering company, and quickly became famous for its performance and reliability. The DFV was notable for its innovative design, featuring four valves per cylinder, which improved airflow and efficiency. Over its production run, the DFV powered numerous teams and cars, contributing to 155 Grand Prix victories and multiple World Championships. Its success helped establish Cosworth as a leading name in motorsport engineering, and the DFV remains a significant milestone in the history of racing engines.