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).
Comparative table of various chassis specifications and a memo regarding weight reduction and increasing engine capacity.
| Identifier | WestWitteringFiles\V\October1930-February1931\ Scan171 | |
| Date | 18th December 1930 | |
| (2) CHASSIS. | SIZE. | TYPE OF BODY. | BODY WT. --- | --- | --- | --- Oldsmobile. | 26.4HP. (3.187 x 4.125) / 6 | Sedan. | 6.5 cwt. Cadillac. | 36.4HP. (3.375 x 4.937) / 8 | Town Sedan. | 10 " Studebaker Dic. 6. | 27.3HP. (3.375 x 4.125) / 6 | Club Sedan. | 9.5 " " Dic. 8. | 34HP. (3.062 x 3.75) / 8 | " | 9.7 " Studebaker President. | 35HP. (3.5 x 4.375) / 8 | Sedan. | 8.7 " " " | " | Brougham. | 11 " Graham Paige. | 29.4HP. (3.5 x 5) / 6 | Wt. from RS{Sir Henry Royce's Secretary}/RM{William Robotham - Chief Engineer}1/AD181230. | 8 " Invicta. | 30HP. (3.5 x 4.75) / 6 | " | 10 " Humber Snipe. | 25HP. (3.1 x 4.55) / 6 | " | 6.5 " RR. 25HP. 18-G-4. | 25HP. (3.25 x 4.5) / 6 | " | 12.5 " These weights should no doubt be accepted with reserve but they shew that we are at a considerable disadvantage. If by co-operation with the body builder on the maximum capacity body sufficient weight could be saved, then in conjunction with some increase in engine capacity the desired result might be achieved as in (b). Unlike the chassis maker the body builder has no direct incentive to save weight. His main object must necessarily be to build a body that will stand up, with weight as a secondary consideration, and the average customer will probably not take much interest in this point. With regard to the question of increasing engine capacity we are at the moment redesigning the 25HP. with half inch longer stroke without adding to the length of the engine. We had previously considered the effect of increasing the bore and had come to the conclusion that an increase to 3.5" would add 1.5" to | ||