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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).
Table of chassis starter rolling condition figures for the 20 HP model, comparing Standard, Lucas, and C.A.V. motors.

Identifier  ExFiles\Box 35\4\  scan 155
Date  23th May 1927
  
X 4584
CHASSIS STARTER ROLLING CONDITION FIGURES. 20 HP.

MOTOR.
Standard 20 HP.
Design. | Actual. | Lucas. | C.A.V.

ENGINE TORQUE. | 560 | 500 | 500 | 500
GEAR RATIO. | 8.4 | 8.4 | 8.4 | 8.4
MOTOR TORQUE. | 66 | 66 | 66 | 66
MOTOR SPEED. | 810 | 715 | 750 | 960
AMPERES. | 137 | 142 | 190 | 153
VOLTS. | 9.26 | 9.16 | 8.4 | 9.0
ENGINE SPEED. | 96.5 | 85 | 89 | 114
E.H.P. | 1.7 | 1.74 | 2.14 | 1.84
B.H.P. | .85 | .76 | .785 | 1.00
EFFICIENCY. | .50 | .435 | .367 | .545

23.5.27.
EFC.
  
  


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