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 data sheet of various cars on face area, volume, and temperature metrics.
| Identifier | ExFiles\Box 5a\5\ 05-page128 | |
| Date | 1st September 1931 guessed | |
| Table 1: CAR. | Face Area per 1000 litre disp. per mile. ROLLS-ROYCE 25 HP. | 83.0 sq.ins. CHRYSLER 75. | 62.7 sq.ins. HISPANO | 77.2 sq.ins. ROLLS-ROYCE 40/50. | 71.2 sq.ins. GRAHAM PAIGE | 65.2 sq.ins. MARMON | 63.0 PIERCE ARROW. | 54.4 Table 2: CAR. | Volume per 1000 litre disp. per mile. ROLLS-ROYCE 25 HP. | 308. HISPANO | 308. ROLLS-ROYCE 40/50. | 285. GRAHAM PAIGE | 221. CHRYSLER 75. | 207. MARMON | 173. PIERCE ARROW | 129.2 Table 3: CAR. | Temp. at 60 M.P.H. on Track. ROLLS-ROYCE 40/50. Vent. Bonnet. | 71°C. CHRYSLER | 73°C. HISPANO. | 74°C. GRAHAM PAIGE. | 77°C. PIERCE ARROW. | 82°C. MARMON | 85°C. Engine tightening up. 25 H.P. ROLLS-ROYCE. | Not yet recorded. Bottom of page: H8/Sd. | ||