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).
Particulars of a 10.HP Peugeot chassis and comparing back axle gear ratios.
| Identifier | WestWitteringFiles\H\January1922\ Scan25 | |
| Date | 8th January 1922 guessed | |
| (2) erproof. I think it would be advisable for us to get particulars of the 10.HP. Peugeot chassis. The D.F.P. has a back axle 4.28 to 1; this we think is too highly geared. Such a small car would not be comfortable even at 50 m.p.h. so that the back axle ratio we think should be nearer 5.25 to 1, to allow the engine to give it's power. R.{Sir Henry Royce} | ||