List of modifications and improvements for a 10,000-mile test car.
| Identifier | ExFiles\Box 11\3\ 03-page011 | |
| Date | 3rd December 1929 guessed | |
| X940D 10,000 MILES TEST CAR+ (1) Asbestos valve stem grummets (examine guides and valve stems before fitting). (2) New type lodge plug with safety terminal. (3) Improved brake life. Increased thickness of material.* Increased foot brake area adjusted Toggles. (4) Clutch fabric on driven plate. Improved lubrication system sliding ball races on the clutch. * (5) Rubber support behind the gearbox. More flexible engine feet. (6) Increased area for starting handles through radiator. (7) Petrol feed. Carburetter with banjo feed to float chambers* base eliminated and replaced by nut and nipple. Improved filter passages. (8) Altered direct braking leverage and cam angle.* (9) Protected cylinder block against corrosion. (10) Spare wheel carrier to take 7"X 21" tyres.* (11) New head to the bijur pump. * (12) Phosphor bronze tappet guides. (13) Rear engine feet with greater flexibility between the foot and the frame than at present .250 Outer Rubber. .125 Inner Rubber. This is made possible by the rubber support behind the gearbox (14) Cast iron cylinder head with larger valves (this may or may not be used but should be available). | ||
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).