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).
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.