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).
The weight of a 16.9 HP 6-cylinder Napier vehicle.
| Identifier | ExFiles\Box 3\3\ 03-page096 | |
| Date | 3rd July 1913 guessed | |
| H.R. Ltd. Form No. 34. 10,000. R.P. 1004 X200 3700. Napier 16.9 H.P. 6 cylinder (For particulars see consumption) Vehicle wt 2,596 lbs. | ||