15 hp
(1904-1905)
Model : 3 cylinder
Year : 1905
Bore : 4"
Stroke : 5"
c.c. : 3,089
h.p. : 15
Clutch : Leather-lined cone type
Gearbox : Three-speed
Final Drive : Fully floating live axle. Spur type gears
Suspension : Semi elliptic
Brakes : Transmission foot brake. handbrake operates on rear wheels
Wheelbase : 8' 7"
Number made :6
Chassis made : £500
Only six examples of the Rolls-Royce 15 hp were completed. The three cylinder engine developed problems and did not run smoothly, problems exacerbated by the extra work caused by the fact that the engine did not share the standard layout of other models. In addition, single cast cylinders and a specially designed crankcase led to high costs for tooling. Not before late in the summer of 1905 was the first Rolls-Royce 15 hp ready for delivery.