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).
Performance test graph for Spectre 3, tracking consumption, temperatures, and speed over four days.
| Identifier | ExFiles\Box 91\4\ scan0252 | |
| Date | 10th September 1935 | |
| 7 - 9 - 35 MORN. 37.1 MPH 297 Miles. NOON. 38.4 MPH 269 Miles. 8 - 9 - 35 A.M. 39.5 MPH 313 Miles. P.M. 39.9 MPH 316 Miles. 9 - 9 - 35 A.M. 38.1 MPH 283 Miles. P.M. 40.5 MPH. 301 Miles. 10 - 9 - 35 A.M. 39.2 MPH. 291 Miles P.M. 40.1 MPH. 301 Miles. OIL. MPG. PETROL MPG. 500 9 475 8.5 450 8 425 7.5 400 7 375 6.5 350 6 325 110°c 100°c 90°c 80°c 70°c 60°c 50°c MPH 70 60 50 40 30 20 40°c 30°c 20°c 10°c PETROL CONSUMPTION. OIL CONSUMPTION. Data points: 8.4, 7.7, 8.1, 7.7, 8.0, 7.6, 8.0, 7.8 Data points: 377, 377, 420, 420, 389, 389, 384, 384 OIL TEMP. WATER TEMP. UNDER BONNET TEMP SPEED & MILES PER HOUR. AIR TEMP. SPECTRECodename for Phantom III 3 PATTINSON WALSH ROBERTS. DARBY. 18.097. ROBERTS DARBY. PATTINSON WALSH 18.726 ROBERTS DARBY. 19.310 PATTINSON WALSH. ROBERTS. DARBY. PATTINSON WALSH. ROBERTS. DARBY. 19.902 | ||