See John Allen and Sons (Oxford) for probable connection.
1887 A manager, John Allen, was brought to Oxford from the Dorchester works.
1897 John Allen bought the company for which he was manager; he concentrated the business on steam road-rolling rather than cultivation, which was a more lucrative business.
1904 ALLEN, John, The Elms, Offaly, Oxford. Cars: 10-h.p. Daimler, 16-h.p. de Dietrich. Has driven 30,000 miles. Hobby: Mechanics. Is proprietor of the Oxfordshire Steam Ploughing Co., and was for four years Chairman of the National Traction-engine Owners' Association. His eldest son, who is now thirteen, has driven the Daimler car since he was eleven-and-a-half years old. Clubs: Constitutional, Oxford Automobile, A.C.G. B. & I. (Founder member).