|Manufacturer||R Barton Adamson & Co|
|Designer||Reginald Barton Adamson|
|Body and chassis|
|Body style||two-seat open|
|Wheelbase||102 in (2,600 mm)|
The first car of 1912 was a small two-seater bullnosed cyclecar and had a 1,099 cc twin-cylinder or 1,074 cc four-cylinder engine made by Alpha of Coventry driving the rear wheels via a three-speed-and-reverse gearbox and a countershaft from which two V-belts went to the rear wheels. The engine could be started from the driving seat using a mechanical linkage. The channel section steel chassis was placed under the axles with suspension by semi-elliptic leaf springs. This arrangement allowed the car to have a low, sporting appearance. In 1914 the option of a larger four-cylinder version was added. A new model was announced in 1916 with 1330 cc four-cylinder engine, but few if any reached the public before car production ceased later that year.
After the war a new company, R. Barton Adamson and Co was formed  and the 1916 four-cylinder car was resurrected but now with a Coventry-Simplex engine. In 1920 it cost £375 falling to £210 in 1924 but to put the price into perspective, in 1923 the Austin 7 was launched costing £165.
The final cars from 1923 were the "Twin-Cars" which were effectively two sidecars side by side with the driver in the off-side one and powered by a choice of air- or water-cooled 9-horsepower 1078 cc V twin cylinder Anzani engines with chain drive mounted between the two passenger units.
Production numbers are not known.
- Georgano, N. (2000). Beaulieu Encyclopedia of the Automobile. London: HMSO. ISBN 1-57958-293-1.
- Worthington-Williams, Michael (February 2003). Enfield Underslung. The Automobile. ISSN 0955-1328. Cite error: Invalid
<ref>tag; name "Automobile" defined multiple times with different content (see the help page).
- Baldwin, N. (1994). A-Z of Cars of the 1920s. Devon, UK: Bay View Books. ISBN 1-870979-53-2.