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Trojan of Kingston Works and later of Purley Way, Croydon produced commercial vehicles.
1913 Prototype built with a two-stroke engine with four cylinders arranged in pairs, and each pair shared a common combustion chamber – a doubled-up version of what would later be called the "split-single" engine. The pistons in each pair drove the crankshaft together as they were coupled to it by a V-shaped connecting rod. For this arrangement to work, it is necessary for the connecting rod to flex slightly. The claim was that each engine had only seven moving parts, four pistons, two connecting rods and a crankshaft. This was connected to a two-speed epicyclic gearbox, to simplify gear changing, and a chain to the rear wheels.
1914 Formed as a private company.
In 1914 he moved to Vicarage Road, Croydon where a second prototype was built. The business was renamed Trojan in 1914 but he lacked the capital to start production.
WWI. Made production tools and gauges.
In April 1920 Trojan advertised that they were prepared to enter a licensing arrangement and by June were talking to Leyland Motors. A deal was made in 1921 for Leyland to make the Trojan car, paying a royalty of £5 for each car. Production was slow during 1922 but picked up in 1923 and around 17,000 were built altogether.
1928 Manufacture moved to the Purley works.
1937 New 15cwt model introduced with Bendix-Cowdray brakes.
1937 Manufacturers of aircraft components. 
1947 A completely new Senior 12/15cwt van produced with either a two-stroke or Perkins P3V engine. This model continued in production until the company ceased business.
1959 the company was bought by Peter Agg and from 1960 to 1965 built Heinkel bubble cars under licence, selling them as the Trojan 200, the last vehicle to bear the Trojan name. The company acquired the rights to build the Elva Courier sports car in 1962, producing 210 cars between 1962 and 1965 when production switched from road cars to the McLaren-Elva racing car.
1961 Employed 500 persons. Makers of Trojan motor vehicles and Trokart racing Karts. Manufacturers of Trojan motor vehicles, including small cars, commercial vehicles, aircraft components, agricultural equipment and Trokart racing karts. 
1963 Motor Show exhibitor. Showed Elva Courier sports models.