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 comparison table of RR and Daimler engines at different RPMs under various conditions.
| Identifier | ExFiles\Box 78\3\ scan0028 | |
| Date | 10th August 1912 guessed | |
| Header: Conditions, Revs. Column Headers: 500, 1000, 1500 Sub-Column Headers: RR (HP, T), Daimler (HP, T) Row 1: Conditions: Radiator & fan off. 500 RPM - RR: HP 19.6, T 2.18; Daimler: HP 15.6, T 3.10 1000 RPM - RR: HP 34, T 1.40; Daimler: HP 31.7, T 2.20 1500 RPM - RR: HP 47.5, T 1.21; Daimler: HP 39.1, T 1.42 Row 2: Conditions: Radiator & fan & silencer off. 500 RPM - RR: HP 19.2, T 2.22; Daimler: HP 17.5, T 2.51 1000 RPM - RR: HP 38.1, T 1.40; Daimler: HP 34.2, T 2.12 1500 RPM - RR: HP 53.1, T 1.18; Daimler: HP 43.6, T 1.42 Row 3: Conditions: Radiator & fan on silencer off. 500 RPM - RR: HP 19.2, T 5.10; Daimler: HP 14.5, T 4.39 1000 RPM - RR: HP 38.1, T 3.9; Daimler: HP 34.2, T 4.25 1500 RPM - RR: HP 53.1, T 2.15; Daimler: HP 43.6, T 3.0 Row 4: Conditions: Complete car. 500 RPM - RR: HP 19.6, T 4.34; Daimler: HP 15.6, T 4.10 1000 RPM - RR: HP 34, T 3.32; Daimler: HP 31.7, T 3.22 1500 RPM - RR: HP 47.5, T 2.25; Daimler: HP 39.1, T 2.55 Row 5: Conditions: Marine engine 4 x 6. RR Gull compression, silencer off. bevel axle Radiator off 500 RPM - RR: HP 19.6, T 2.37 1000 RPM - RR: HP 40, T 1.34 1500 RPM - RR: HP 52.9, T 1.15 | ||