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).
Performance test results for the Original Big Bore Unit in a Bentley I.
| Identifier | ExFiles\Box 155\1\ scan0189 | |
| Date | 21th September 1935 | |
| X1320 21.9.35. Original Big Bore Unit in Bentley I. Large Carburetters, standard exhaust system, 6.8 C/R.{Sir Henry Royce} Lap Speeds 1 min. 49 4/5. 90.72 m.p.h. C.O. Open 1 min. 49 91.38 m.p.h. C.O. Closed 1 min. 51.1 89.74 m.p.h. 1/2 Mile. 19 secs. 94.74 m.p.h. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||