1938 Ariel Square 4
Cylinder number / capacity - 4/997 cc
Power - 45 bhp @ 5500 rpm
Transmission - 4-speed gearbox to chain final drive
Wheelbase - 56 inches (1,422 mm)
Dimensions - L 82 inches (2,100 mm)
Fuel capacity - 5 imp gal (23 l; 6.0 US gal)
Production 1931–1959
en.wikipedia.org
Ariel Motorcycles was a British motorcycle manufacturer based in Bournbrook, Birmingham. It was one of the leading innovators in British motorcycling, and was part of the Ariel marque. The company was sold to BSA in 1951 but the Ariel brand survived until 1967. Influential Ariel designers included Edward Turner and Val Page. The last motorcycle-type vehicle to carry the Ariel name was a short-lived 3-wheel tilting moped launched in 1970.
Ariel had made bicycles before making motorcycles, and had also made automobiles. Car production, which began in 1902, moved to Coventry in 1911, but ceased in 1925.
The 'Ariel' name was reused in 1999 for the formation of Ariel Ltd, a sports car producer.