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 on engine detonation using a Delco distributor with different petrol types.
| Identifier | ExFiles\Box 97\5\ scan0010 | |
| Date | 19th January 1939 | |
| -2- 19.1.39. Delco distributor. Azur petrol. Timed T.D.C. No detonation at all. It appears from the above that with Tourisme petrol which is equivalent to Redline, the Delco distributor is better at low speeds, but detonations are too bad to consider with either distributors. With better grade petrols detonations are just audible and we think may be passable with either distributors. RM{William Robotham - Chief Engineer}/P.H.Rose. A.J.Gardiner. | ||