Eric Longden was a British cyclecar brand manufactured from 1920 to 1927, originally by the Australian racing driver Eric Longden, and from 1922 by the Air Navigation and Engineering Company from Addlestone (Surrey). ANEC also built the Blériot-Whippet.
In 1922 there were four models: The 8 hp and 10 hp both had V2 engines. The 8 hp was side-valved and had a 1.0 litre displacement, while the 10 hp had overhead valves and a 1.1 litre displacement. There were also two side-valve four-cylinder models, the 9 hp, with a 1.1 litre displacement and the 11 hp with 1.3 litre displacement. Both four-cylinder versions had a wheelbase of 2489 mm.
During 1923, the 11 hp changed to a slightly smaller engine of 1.25 litres and an extended 2540 mm wheelbase. From 1924 onwards, this was the only model offered.