The Lancia Stratos HF, widely known as Lancia Stratos is an automobile made by Italian car manufacturer Lancia. The HF stands for High Fidelity. The Stratos was a very successful rally car during the 1970s and early 1980s. It started a new era in rallying as it was the first car designed from scratch for this kind of competition. The three leading men behind the entire rallying project were Lancia team manager Cesare Fiorio, British racer/engineer Mike Parkes and factory rally driver Sandro Munari. For racing, the engine was tuned up to 280 hp (209 kW) and even to 560 hp (418 kW) with a single KKK turbocharger. However, turbocharged versions were only allowed to compete in Group 5 and were never as reliable as their naturally aspirated counterparts. At the Geneva Auto Show of 2005, a British design firm known as Fenomenon debuted a retromodern concept version of the Stratos.