From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Phantom II car, No. 80 W.J., detailing engine noise, fuel consumption, and clutch issues.
| Identifier | ExFiles\Box 19\6\ Scan010 | |
| Date | 11th August 1930 guessed | |
| REPORT ON ROLLS-ROYCE PHANTOM II. No. 80 W.J. Engine No. U.M.68. ENGINE: Valve clatter and tappet noise is very pronounced when the engine is started up in the morning. This noise diminishes as the temperature increases, but the engine is still noisy under all conditions. There is pronounced piston slap in one cylinder when starting up from cold; this piston slap develops into a steady throb which can be felt at all times by the driver when the engine is picking up under load. This throb is more in the nature of a thump than any clearly defined noise. The carburation is so adjusted that with the Mixture adjustment control on the weak side, the miles per gallon consumption in London is 7½ m.p.g. A comparison between this and the Writer's Hispano-Suiza car may prove of interest - this latter car averaged 12½ m.p.g. under equal conditions. CLUTCH: Satisfactory apart from the fact that the clutch stop does not stop it rotating unless the clutch pedal is held in one position. If the foot is depressed too much or too little the gears cannot be engaged. GEAR-BOX: Satisfactory. (1). | ||