Enfield-Allday (United Kingdom)

Enfield-Alldays Motors Ltd was a British automobile manufacturer based in Sparkbrook, Birmingham, which operated from 1919 to 1924. The company was formed through the merger of Enfield and Alldays, both of which had produced conventional car designs prior to World War I. The newly merged entity aimed to innovate in the post-war automotive market, introducing the Enfield-Allday Bullet, a vehicle featuring a unique 5-cylinder sleeve-valve radial engine and a tubular lattice frame. This model was first announced in early 1919, with an initial price of £250, which increased to £350 by the time of its exhibition at the Olympia Show later that year. However, only a few units of the Bullet were ever produced, and the model faced criticism for its economic viability.

In an effort to revitalize the company, A.C. Bertelli was appointed as general manager. He designed a more conventional light car powered by a 1488cc 10/20hp side-valve 4-cylinder engine, which was launched in 1921. Despite the aesthetic appeal of the bodies crafted by Bertelli's brother, Harry, the 10/20 was considered overpriced at £575. Sales remained sluggish, with the company managing to sell only around 100 cars over its brief existence.

In April 1923, Enfield-Allday went into liquidation but was reorganized and relocated to a smaller factory in Small Heath, Birmingham. The 10/20 was then offered with a variety of coachwork options, but the company continued to struggle financially. By 1924, the parent company, Alldays & Onions, collapsed, leading to the demise of Enfield-Allday. Although it was briefly reformed as Allday Motor Repair Ltd, no further cars were produced, and the brand name faded from the automotive landscape by 1926. Bertelli later went on to design racing cars and contributed to the development of a prototype that would influence the creation of the 1927 Aston Martin.