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).
Engine power and performance test results for chassis 1510.
| Identifier | ExFiles\Box 33\4\ Scan064 | |
| Date | 22th February 1911 | |
| R R.{Sir Henry Royce} 148 (20m) (P 689.14.11.10) G 1239. comparing 1500 & 1100 cars 4000 POWER X1770 HP 1510 Chassis. E1066 Eng revs. H.P. 500 20.8 750 30.6 - 1000 38.2 1250 42.8 1500 46.2 1750 (Stamp: Used when Engines too) 1500 Engine, Old type Camshaft, Taken by Lowe on Dynamometer 22/2/11. Engine slightly stiff 68 to 70 lbs comp Specially high compression Capacity as made 22 cu ins. Guage test. 68 to 70 lbs. On road - engine rattles & chattered hard running under least power & at practically all speeds. RB{R. Bowen} See sheet under P. file. | ||