Specification sheet detailing vehicle performance figures and engine details.
| Identifier | ExFiles\Box 127\5\ scan0089 | |
| Date | 22th January 1942 | |
| -cont'd- -3- Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} 9/OH.22.1.42. car, but do appreciate a motor that holds the road, and has a snappy performance. We give herewith a specification of the car and actual performance figures taken on the road. Top Gear Performance. 10 - 20 MPH 6.75 Sec 20 - 30 " 7.2 " 30 - 40 " 8.15 " 40 - 50 " 8.6 " 50 - 60 " 13.9 " Mean maximum speed 68.5 MPH. Petrol Consumption at Constant Speeds. 20 MPH 36.75 MPG. 30 " 40.75 " 40 " 34.55 " 50 " 31.55 " Average consumption over 97 mile run at an average speed of 39 MPH. 27.4 MPG. SPECIFICATION. Engine. Four cylinder narrow V aluminium monobloc with special cast iron bores. Cast Iron cylinder head with overhead valves. Hemispherical combustion chamber, with central sparkling plug. Bore 72 mm; Stroke 83 mm. Cubic Capacity 1352 cc's HP at 4000 R.P.M. - 47 Treasury Rating in United Kingdom 12.9. H.P. Distribution. Inclined overhead valves controlled by a single shaft driven at front by silent chain, with automatic tensioning device. -continued- | ||
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).