What do the initials 'M.G.' traditionally stand for in the name of the iconic car brand?

MG is a British automotive marque founded by Cecil Kimber in the 1920s, and M.G. Car Company Limited was the British sports car manufacturer that made the marque famous. Best known for its open two-seater sports cars, MG also produced saloons and coupés, with engines up to three litres in size. The marque is now owned by state-owned Chinese company SAIC Motor Corporation Limited.

MG cars had their roots in a 1920s sales promotion sideline of Morris Garages, a retail sales and service centre in Oxford belonging to William Morris. The business's manager, Cecil Kimber, modified standard production Morris Oxfords and added 'MG Super Sports' to the plate at the nose of the car. A separate M.G. Car Company Limited was incorporated in July 1930. It remained Morris's personal property until 1 July 1935, when he sold it to his holding company, Morris Motors Limited.