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).
Engine performance and design from the T.T. race, focusing on Riley, Alfa, and M.G. cars.
| Identifier | ExFiles\Box 3\4\ 04-page090 | |
| Date | 24th August 1932 | |
| X 4583 To R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} E.11/HP.24.8.32. c. Sg.{Arthur F. Sidgreaves - MD} For. Hsi-By.{R.W. Bailey - Chief Engineer} re T.T. Race. In the T.T. race of last Saturday it is interesting to note that the winning Riley engines fitted with push rod valve gear operated at over 6000 r.p.m. There were a number of Rileys in this race some fitted with very light valves and springs of 35 lb. loading, and others with much heavier valves and 60 lbs springs representing two schools of thought. Ultimately the heavier valves proved to be the more durable. These engines are of 1100 cc. capacity, 4 cylinders unsupercharged and developed 56 B HP with 8-2/1 compression ratio on a 40/60 Benzol BP.Plus fuel. The 2600 cc. supercharged Alfas driven by Birkin and Howe on the other hand, Kyston tells us were fitted with tachometers having a maximum scale reading of 5000 r.p.m. These cars it is understood did 130 m.p.h. along the straight. The M.G. Midgets, of which one came in third were fitted with Powerplus blowers and did 102 m.p.h. E.{Mr Elliott - Chief Engineer} | ||