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).
Comparing fuel or oil consumption figures for various engines, including Rolls-Royce, Chrysler, and Pierce.
| Identifier | ExFiles\Box 29\4\ Scan058 | |
| Date | 20th August 1930 guessed | |
| R.P.M. 1 mule - 60 G.P.H. = 3005 3005 7.30 20 H.P. R.R. 100/ 2 gal. R.R. 100 cu ins / 1.94 gal. Herod (crossed out) Chrysler 100 cu ins / 1.28 gal. Chrysler (crossed out) Pierce + / 1.05 gal. | ||