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).
Performance comparison graph of the 25/30 HP engine against American engines (Buick and Terraplane).

Identifier  ExFiles\Box 134\2\  scan0114
Date  1st January 1937
  
25/30 COMPARED WITH AMERICAN ENGINES

Top Graph:
COMPARISON OF 25/30 H.P. BUICK AND TERRAPLANE. OPEN EXHAUST.
Legend:
- 25/30
- Buick
- TERRAPLANE

Bottom Graph:
COMPARISON OF 25/30 H.P. AND BUICK COMPLETE WITH EXHAUST SYSTEM.
Legend:
- 25/30
- Buick

Y-Axis Label: B.M.E.P.
Y-Axis Values: 110, 100, 90, 80, 70
X-Axis Values: 500, 1,000, 1,500, 2,000, 2,500, 3,000, 3,500, 4,000, 4,500

Annotations/Stamps:
- S (circled)
- 7D (circled)
- 537
  
  


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