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).
Table comparing the weights of components for different car models including Phantom III, 20/25, Bentley, and Buick.
| Identifier | ExFiles\Box 107\4\ scan0142 | |
| Date | 11th February 1936 | |
| -4- Hs{Lord Ernest Hives - Chair}/Std.19/KW.11.2.36. Section of Car | Ph.III | 20/25 | Bentley | Buick --- | --- | --- | --- | --- Oil - engine, sump and gearbox, axle, etc. | 29.9 | 23.3 | 23.3 | - Petrol - 18 gallons in case of 20/25 & Bentley, 33 gals.in case of Ph.III and gals.in case of Buick. | 248.0 | 135.0 | 135.0 | 97.5 Floorboards. | 22.5 | 9.5 | 16.25 | - T O T A L. | 4181.0 | 2879.2 | 2429.1 | Hs{Lord Ernest Hives - Chair}/Std. | ||