The Lancia Aurelia was first introduced at the Turin Motor Show of 1950. This innovative automotive creation included a narrow 60°, all-alloy, V6 engine (the first production V6 car) that ranged from 1.8 litres to 2½ litres over the life of its six series. Drive was through the rear mounted transaxle that incorporated the gearbox, clutch, differential and inboard mounted drum brakes to reduce unsprung weight. The sliding pillar front suspension was complemented at the rear by semi-trailing arms. By the 4th series, those trailing arms were replaced by a de Dion tube and the engine's white metal bearings replaced with shell bearings. Most Lancia motorcars, up until 1955, were manufactured at the factory in righthand drive form; the series IV cars started to see the addition of lefthand drive as these were the first cars to be imported into America in significant numbers. Clothed with a lightweight coupé body, it not only gave the Aurelia GT sports car performance but saloon car practicality also. It soon became apparent that, with the fine chassis design and a smooth V6 power plant, the car lent itself for competition use with many period competition successes such as Le Mans, the Targa Florio, Mille Miglia, and Monte Carlo Rally. This still holds true today with many B20s being used in club and prestigious historic events. Mike Hawthorn took delivery of a Series IV Aurelia B20 GT in 1954 that was modified with floor mounted shift, wood and alloy steering wheel with further upgrades to the engine and exhaust. That car, WPD 10, is still in existence today.