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).
Bar chart comparing shock absorber performance and the effect of tyre pressure on different cars.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan048 | |
| Date | 26th April 1926 guessed | |
| COMPARISON OF DIFFERENT CARS TYRE PRESSURES 40 & 45 LBS/□" ROAD SPEED 23 M.P.H. EFFECT OF TYRE PRESSURES LANCIA CAR ROAD SPEED 23 M.P.H. 9 C.C. - 20 H.P. REAR SHOCK ABSORBERS 40 LBS FRONT HYDRAULICS 35 C.C. - LANCIA REAR DAMPERS. 31 LBS. 40 C.C. - SILVER GHOST SHOCK ABSORBERS FRONT 25. REAR 25. 35 C.C. - TYRE PRESS. 40 & 45 LBS/□" 8 C.C. - TYRE PRESS. 25 & 30 LBS/□" | ||