Rolls Royce Phantom 3
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Rolls Royce Phantom 3 History
The Rolls Royce Phantom three is powered by an aluminium-alloy V12 engine of 7.32 litres, having a bore of 3.25 inches and a stroke of 4.5 inches. It is a pushrod engine with overhead valves operated by a single camshaft in the valley between the cylinder banks. Early cars had hydraulic tappets or, rather, a unique system of eccentric bushings in each individual rocker that was actuated by a small hydraulic piston; the eccentric bushing ensuring zero valve-lash at the rocker/valve interface. This system was changed to solid adjustable tappets in 1938. The Rolls Royce Phantom III is unusual for its twin ignition systems, with two distributors, two coils and 24 spark plugs. Fuel is provided by a twin SU electric pump. Wire wheels are fitted as standard, but many cars carry Ace wheel discs.
The car features on-board jacking and a one-shot chassis lubrication system, operated by a lever inside the driver's compartment. Independent front suspension by a coil spring-based system is complemented by a carryover semi-elliptical spring unit in the rear. The car has a 4-speed manual Gear box with synchromesh on gears 2, 3 and 4. Overdrive was added in 1938. The car has 4-wheel servo-assisted brakes applied by cable (using a servo made under licence from Hispano-Suiza). The radiator shell is of Staybrite steel.
The sheer bulk of the car is reflected in its performance figures. An example tested in 1938 by The English Autocar magazine returned a top speed of 87.5 mph and a 0 - 60 mph in a time of 16.8 seconds. The overall fuel consumption quoted from that road test was 10 mpg.