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).
Petrol consumption for vehicle 20-G-IV, comparing two carburettor configurations.
| Identifier | ExFiles\Box 102\1\ scan0266 | |
| Date | 12th February 1935 | |
| Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}3/KW.12.2.35. Petrol Consumptions on 20-G-IV. Reversed Throttle Carburetter, XC1 needle, carburation O.K. 30 MPH. constant/ 1/4 gallon/ 11.4 miles/ 22.8 MPG. Fast run not exceeding 60 MPH/ 1/4 gallon/ 9.2 miles/ 18.4 MPG. Modified Carburetter to LEC.4292, XC needle, as tested by Mx.{John H Maddocks - Chief Proving Officer} 30 MPH constant/ 1/4 gallon/ 9.8 miles/ 19.6 MPG. Fast run not exceeding 60 MPH/ 1/4 gallon/ 9.1 miles/ 18.2 MPG. Hs{Lord Ernest Hives - Chair}/G.Ratcliffe. | ||