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).
Road testing performance, detailing fuel consumption, speed, and distance for various journey segments.
| Identifier | ExFiles\Box 160\3\ scan0133 | |
| Date | 30th January 1939 | |
| ( 3 ) The brakes do not allow for any slight error in judging distance at these high speeds. Petrol consumption on the Autobahn as calculated by speedometer reading and fuel gauge for 85 and 100 miles is, 13 m.p.g. or 22 L/100 Km. All running cut-out open. After reducing tyre pressures to original for road work, the car was driven back to Metz on the return to Paris. Place. Distance. Time Mins. Avg. Speed. MPH. KPH. Total Distance Remarks. ------------------------------------------------------------------------------------------------ Mannheim 65L. Azur at 510 M.{Mr Moon / Mr Moore} Forbach 87 mls. 138" 38 61 510 Mls. Metz 50 " 66 45.5 73 647 " 2 L. XXL Oil at 647 M.{Mr Moon / Mr Moore} 30.I.39 Metz Verdun 59 k.{Mr Kilner} 38 57.8 93 687 Oil 105°c 75 L. Azur Water 88°c Oil 118°c Detonation up to 1500 rpm. 2nd gear out twice. La{L. A. Archer} Ferté s/Jouarre 122 Mls. 102 71.7 115 809 Mls. 19k to N.D. Porte de Pantin 230 k.{Mr Kilner} 129 66.5 107 Rue Gide 11 k.{Mr Kilner} 14 65.2 105 847 Mls. 854 Mls. 55 L. in tank gauge correct Petrol consumption for 854 mls. 13.5 m.p.g. 21 L/100K. Oil consumption approx. 1250 m.p.g. On the outward run violent acceleration brought up half crankshaft period when hot, but on the return journey this was never apparent with the throttle used gently. Crankshaft damper was set at 14 lbs. ----------- Rm{William Robotham - Chief Engineer}/GR{George Ratcliffe} [Signature] | ||