Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,170 pages of information and 233,417 images on early companies, their products and the people who designed and built them.
of Hunt End, Redditch (1906)
of Sparkbrook, Birmingham (1908)
1906 March. Share prospectus. 160,000 shares of £1 each. Directors are -
1906 March. Details of the 30-hp car.
1906 November. See Enfield Autocar Co: 1906 Dinner
1907 Alldays and Onions acquired the car making part of Enfield, namely Enfield Autocar Co. Initially the two car making activities were kept separate.
1908-11 Annual reports, in Coventry Archives
1911 October. Details of five models: 10hp (2); 12hp (4); 14-16hp; 16-20hp, and the 20hp.
1912 Alldays and Onions acquired the Enfield Autocar Co including manufacturing rights and trade mark; the company had also established its own works for car manufacture; manufacture of the two types of car would be kept separate; motorcycles were also built.
1913 November. Details of the 8hp, 14.3hp, 18.4hp, and the 24.9hp cars. Also new 9hp four-cylinder car.
1913-1917 For a list of the models and prices of Cars see the 1917 Red Book
1913-1917 For a list of the models and prices of Petrol Motor Commercial Vehicles see the 1917 Red Book
1913 April. Advert in Autocar for the Enfield Autocar Co of Birmingham and showing Model 255 of 24.9 hp and mentions the Autolette. 
In 1914 a 35hp Enfield with a 26-seat bus body was put into service by Mid Cheshire Motor Bus Co. This bus ran for 10 years.
Enfield built commercial vehicles up until 1915.
The two car production activities were merged as Enfield-Allday which continued to produce cars until 1925