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 chassis weights for the Phantom II and 20/25 models.
| Identifier | ExFiles\Box 18\1\ Scan029 | |
| Date | 26th November 1929 guessed | |
| x7840. P.II & 20/25. CHASSIS WT. ------------ x7840. x4538. FRONT. REAR. L.H. P.II 2031. 1936 20/25. 1407. 1309. wts. include petrol, water, battery, bonnet but no spares. | ||