Fuel consumption test report comparing models 18-G-IV and 21-G-IV over a 112-mile course.
| Identifier | ExFiles\Box 102\1\ scan0169 | |
| Date | 30th April 1934 | |
| Copy for R.R. Carb File X5080 30.4.34. Consumption Test. 18-G-IV & 21-G-IV. Course :- Ashbourne, Buxton, Chapel-en-le-Frith, Glossop, Bamford, Bakewell, Winster, Wirksworth, Duffield, Derby. 21-G-IV. Miles 112. Petrol 7.5 galls. S.V.R.R. Cons. 14.93 M.P.G.+ Average speed 42 M.P.H. 18-G-IV. Miles 112. Petrol 7.625 galls. Standard R.R. Cons. 14.68 M.P.G. Average speed 42 M.P.H. A.B. Roberts. R. {Sir Henry Royce} Pattinson. | ||
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).