[6] In 1899, he went into partnership with pioneering motorist Charles Jarrott and Herbert Duncan to found De Dion-Bouton British and Colonial Ltd as importers of cars.
[1] In 1907 The Sydney Morning Herald reported: "S. F. Edge (1907), Ltd., has been registered at Somerset House, London, with a capital of £275,000, to carry on the business of motor car, cycle, launch, and flying machine manufacturers.
[1] Recognizing the value of publicity gained from auto racing, which no other British marque did,[1] Edge entered an 8 hp (6 kW) four-cylinder Napier in the Automobile Club's 1900 Thousand Miles (1600 km) Trial of the Automobile Club on behalf of Edward Kennard; driven by Edge, with Kennard along, and the 14-year-old St John Nixon as his mechanic, on a circuit from Newbury to Edinburgh and back, she won her class, being one of only thirty-five finishers (of sixty-four starters)[12] and one of just twelve to average the requisite 12 mph (19 km/h) in England and 10 mph (16 km/h) in Scotland.
[13] In the 1901 Paris-Bordeaux race that included the Gordon Bennett Cup, Edge entered a special 17-litre Napier which he was only able to test en route because it had been completed on 25 May, only four days before the event.
In 1903 Edge's eye for publicity created a world first when, on 2 October, Dorothy Levitt won her class at the Southport Speed Trials driving his 12 Hp Gladiator, shocking British society as she was the first woman, a working secretary, to compete in a 'motor race'.
[15] In June 1907 Edge broke the 24-hour distance record, driving a 60 hp (44.7 kW) Napier six, at the newly opened Brooklands track, accompanied by riding-mechanic Joseph H Blackburn.
[18] In 1922 Edge returned to Brooklands in a Spyker setting a new "Double 12" world record covering 1,782 miles 1,066 yards (2,868 km 693 m) at an average speed of 74.27 mph (119.53 km/h) for the aggregate 24 hours.
[19] Edge lent Mrs Victor Bruce an AC Six car (PF6465) which she drove in the 1927 Monte Carlo Rally, travelling 1,700 miles (2,700km) in 72 hours without sleep, finishing sixth overall, and winning the Coupe des Dames, for the women's class.
[1] In 1903 Edge won the inaugural British International Harmsworth Trophy for speedboats held on the River Lee, Queenstown, Cork Harbour, Ireland, in a boat called Napier I.