ABC Motors Ltd (All British (Engine) Company) of Hersham, Surrey was a manufacturer of cars, aircraft, motor scooters, and engines for road and air. Established by Ronald Charteris in Byfleet, Surrey in 1912, it was bought by Sopwith in 1919 as that company attempted to diversify its activities following World War I. Sold again in 1921 when Sopwith was bankrupted, it continued its activities until it was absorbed into Vickers in 1951. Its chief designer was Granville Bradshaw.

The company's products included:

• ABC Dragonfly (aero engine, and an engineering disaster)
• ABC Gnat (aero engine)
• ABC Scorpion (aero engine)
• ABC Wasp (aero engine)

• ABC Robin (light aircraft)

• ABC (1920 automobile)
• ABC Supersports (light sportscar)
• ABC Skootamota (motor scooter)
• ABC Motorcycle