Early Rolls-Royce engine vintage car front grille at Schlumpfs motor Museum Mulhouse France Horizontal 099355_Schlumpf Museum
Rolls-Royce 20 hp (1905) The Rolls-Royce 20 hp was one of four cars to be produced as a result of an agreement of 23 December 1904 between Charles Rolls and Henry Royce. Badged as a Rolls-Royce, the 20hp was produced during 1905 and 1906 by Royce's company, Royce Ltd. at its factory in Trafford Park, Manchester. It was sold exclusively by Rolls' motor dealership, & Co., at a price of GBP650. The 20hp was exhibited at the Paris Salon in December 1904, along with the 10hp, 15hp and engine for the 30hp models. The engine was made of two separately cast two cylinder unit which were common with the two cylinder 10 hp and six cylinder 30 hp types sharing their bore of 4 in (102 mm) and stroke of 5 in (127 mm). It is water-cooled and of 4118 cc capacity with overhead inlet and side exhaust valves. Early cars had a high tension ignition system using pre-charged accumulators, a trembler and a coil ignition system; on later cars this was supplemented by a magneto which could be used as an alternative. As the lighting supplied uses oil for the side and tail and acetylene for the headlights, there is no other drain on the accumulators which need to be recharged between outings. The power output is 20 bhp (15 kW) at 1000 rpm. The engine speed is controlled by a governor that can be over-ridden by the pedal controlled accelerator. A three speed gearbox was fitted at first, later changed to four speed with the introduction of the Light 20 and subsequently fitted to all cars, connected to the engine via a short shaft and a leather lined cone clutch is used. On the four speed type, third gear is direct and fourth speed an overdrive ratio. Two of the cars ran in the 1905 Isle of Man TT race and one driven by Percy Northey came second overall, the other driven by Rolls failed to finish after gearbox problems. Rolls tried again in 1906 and won. In December 1906 he took a car to the United States and won a race at Yonkers. The first cars had a chassis length of 114 in.
Size: 5100px × 3400px
Location: Schlumpfs Museum Rue de l'Épée Mulhouse Alsace France
Photo credit: © Daniel Valla FRPS / Alamy / Afripics
License: Licensed
Model Released: No
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