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).
Fuel consumption and performance test report comparing Pyrol and Petrol fuels on car 49 GB.

Identifier  ExFiles\Box 32\1\  Scan079
Date  15th May 1923
  
X1555
ROLLS-ROYCE LTD.
INSTRUCTIONS
To: Mr Hives
15/5/ 1923
Order No.
Customer's No.
Consumption Test using
Pyrol mixture & Petrol.
Tests carried out on 49 GB
Consumption
Speed | Pyrol | Petrol
20 MPH | 18.2 M.P.G | 16.6 M.P.G
30 MPH | 16.2 | 15.8 M.P.G
Building up Test - full throttle
10 MPH Pyrol is slightly worse at this speed than Petrol.
At 5 MPH Pyrol is very bad will hardly run the car.
With Petrol one or two miss fires. Tests 1/2 mile each before acceleration.
Signed: A.F.H.
This Sheet must be filed on completion of the work.
  
  


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