Rolls-Royce Archives
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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).
Graph comparing the power per unit cubic capacity and petrol consumption of a Lorraine-Dietrich engine and a 20 HP engine.

Identifier  ExFiles\Box 22\4\  Scan101
Date  16th March 1927
  
4
LORRAINE-DIETRICH & 20 HP R.R.
COMPARISON OF POWER PER UNIT CUBIC CAPACITY & PETROL CONSUMPTION.
COMPRESSION RATIOS:-
LORRAINE = 5.9 to 1
20 HP R.R. = 4.75 to 1.
BRAKE HORSE POWER PER LITRE
R.P.M. OF ENGINE.
B.H.P. PER LITRE.
LORRAINE.
20 HP R.R.
20 HP. R.R. WITH 5.9 TO 1 COMP. RATIO. (CALCULATED).
PETROL CONS. (PTS / BHP / HR)
LORRAINE
20 HP. R.R.
CONSUMPTION (PTS / BHP / HR)
  
  


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