In 1952, the Minor was substantially re-engineered following the merger of the Nuffield Organization (Morris's parent company) with the Austin Motor Company to form the British Motor Corporation. As part of a rationalisation programme to reduce the production of duplicate components for similar vehicles, the Minor drivetrain was completely replaced with an Austin-derived engine, gearbox, propshaft, differential and axle casing. The more modern Austin-designed overhead valve A-series engine, which had been designed for the Minor's main rival, the Austin A30, was smaller in all dimensions, but nevertheless gave noticeable performance improvements over the pre-war side-valve Morris unit it replaced. The 52 second drive to 60 mph (97 km/h) was still calm, but top speed increased to 63 mph (101 km/h). Fuel consumption also rose to .