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 of front and rear chassis weights for the Phantom II and 20/25 models.
| Identifier | ExFiles\Box 107\4\ scan0104 | |
| Date | 17th February 1931 guessed | |
| X4538. x7840- x4538. P.II & 20/25. CHASSIS WT. --------------------------- FRONT. REAR. L.H. P.II 2031. 1936 20/25. 1407. 1309. wts. include petrol, water, battery, bonnet but no spares. | ||