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).
Test report from a visit to Brooklands detailing car specifications and fuel consumption results.
| Identifier | ExFiles\Box 83\1\ scan0120 | |
| Date | 28th May 1936 | |
| X 20D (4) Hs{Lord Ernest Hives - Chair}/ABR.{A. B. Roberts}14/KW.28.5.36. 6-B-IV - Visit to Brooklands 29.4.36. Weight of car and full tank - 1 ton 13 cwts. 1 qr. 7 lbs. Axle ratio 10 x 41. Tyre size 5.50 x 18. Engine Bore 3 1/2"; stroke 4 1/2. Cylinder head Piece No. BV-86, Turbulent type. Capacity 109 c.c's - Inlet Valve Ex.18251. Exh. Valve Ex.2532. Cut-out closed for all the tests. Three persons on the car for the road runs in both directions and 2 for the track runs. Consumption test on outward journey, small carburetters and induction pipe fitted. Miles covered - 142. Petrol used 10 gallons; consumption 14.2 M.P.G. Average speed 50.1 M.P.H. Consumption test on return journey, Large carburetters and induction pipe fitted. Miles covered - 139. Petrol used - 10 gallons; consumption 13.9 M.P.G. Average speed 46.3 M.P.H. Weather conditions on both journeys good. | ||