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 graph showing horsepower curves from bench and dynamometer tests for the 40/50 Chassis E.
| Identifier | Morton\M7\ img067 | |
| Date | 5th May 1921 guessed | |
| BENCH TEST - CUT OUT OPEN. - HP CURVE BENCH TEST - CUT OUT CLOSED. - HP CURVE DYNAMOMETER TEST. CUT OUT OPEN. HP CURVE DYNAMOMETER TEST. CUT OUT CLOSED. HP CURVE ROAD SPEED WITH BA ROAD SPEED WITH B ROAD SPEED WITH P (34.5 750 1000 1250 40/50 CHASSIS E | ||