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 results table for a standard chassis, detailing horsepower, consumption, and temperatures at various RPMs.
| Identifier | ExFiles\Box 50\3\ Scan272 | |
| Date | 14th January 1924 guessed | |
| STANDARD CHASSIS 1st Test R.P.M. HP Cons. Pints per HP hour. 500 21.5 1.11 750 32.0 .92 1000 41.5 .88 1250 50.0 .84 1500 56.0 .84 1750 59.0 .86 2000 60.0 .90 * 2000 Test 2 HP Cons. Inlet pipe temp. ° F. {Mr Friese} (2nd run to check figures). 23 1.04 82 94 33.5 .83 82 94 42.5 .87 82 94 52.0 .84 78 89 59.0 .91 76 94 63.5 .92 76 94 63.0 .97 84 96 3rd Test HP Pints per HP hour. Inlet pipe temp. ° F. {Mr Friese} 33.5 .92 62 42.5 .90 64 50.5 .88 64 57.5 .87 62 62.0 .84 64 63.0 .90 72 64.5 .80 84 * At 2000 R.P.M. cock on exhaust was opened and power immediately jumped and gas consumption went down. | ||