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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).
Comparative table of car radiator specifications based on engine displacement per mile on a direct drive basis.

Identifier  ExFiles\Box 24\4\  Scan112
Date  3rd October 1923 guessed
  
COMPARISON ON ONE LITRE DISPLACEMENT PER MILE ON DIRECT DRIVE BASIS.

First table:
Column Headers: Car. Order of merit., Area of matrix face per 1000 ltr. displ:per mile., sq.ins.
Fiat: 110.0 (handwritten: 108)
Panard: 100.33
Delage: 98.6
Bentley: 95.3
R-R 20 HP.: 90.8
Hispano: 88.6
Farman: 86.0
Isotta: 78.3
Napier: 78.1
Voisin: 74.5
Minerva: 65.25
New R-R Rad (handwritten) R-R 40/50: 60.6
R-R 40/50: 57.6 (crossed out)
Packard: 51.4

Second table:
Column Headers: Car. Order of merit., Wtr.cap. galls.per 1000 ltr. displ:per mile., galls.
Minerva: 1.2 (handwritten over a crossed-out 1.8)
Hispano: 1.149
Bentley: 1.145
Delage: 1.09
R-R 20 HP.: .95
R-R 40/50: .888
Voisin: .803
Fiat: .772

Third table:
Column Headers: Car. order of merit., Surface of core per 1000 ltrs. displ: per mile., sq.ft.
Panard: 31.05
Isotta: 26.9
Hispano: 25.62
Farman: 24.9
Fiat: 23.9
R-R 20 HP.: 22.8 (handwritten over a crossed-out 21.75)
Bentley: 20.65
Delage: 20.4
Minerva: 20.25
Napier: 19.9
New R-R Rad (handwritten) R-R 40/50: 18.5
R-R 40/50: 17.62 (crossed out)
Voisin: 16.18
Packard: 15.0

Fourth table:
Column Headers: Car. Order of merit., Surface of core per inch of depth per 1000 ltr. displ: per mile., sq.ft.
Fiat: 7.93
Panard: 7.79
Hispano: 7.0 (crossed out, handwritten correction: 7.4)
Bentley: 6.89
Delage: 6.28
Farman: 6.2
R-R 20 HP.: 5.77
Isotta: 5.67
Voisin: 5.3
Napier: 4.97
Minerva: 4.16
Packard: 3.87
New R-R Rad (handwritten) R-R 40/50: 3.85
R-R 40/50: 3.68 (crossed out)

Footer note: A G a Pomes. 1
  
  


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