Comparison list of various 12 volt and 6 volt chassis starter motors and their reference numbers.
| Identifier | ExFiles\Box 61b\3\ scan0084 | |
| Date | 28th September 1920 | |
| sl6027. 28.9.20. X.543 - CHASSIS STARTER MOTORS (All 12 volt except Bijur A.21 6 volt). For comparison of design and performance. C.A.V. Z.C. X.3247. Lucas A.510. X.3161. Bijur A.21. X.1058. Bosch. S.45. X.1248. R.R.17. X.2642. R.R.24 X.2642. R.R.45a. X.2642. R.R.45b. X.3082. R.R. Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)). X.3534.X.4384. Bijur 1 AD. X.1058. U.S.A. Bosch. X.4007. Westinghouse. X.1086. EFC. {E. Fowler Clarke - Electrical Engineer} | ||
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).