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 two Bentley models.
| Identifier | ExFiles\Box 155\1\ scan0306 | |
| Date | 25th June 1937 guessed | |
| (2.) Production Bentley - B72.KT. Lap. - 1m 57.2 secs = 84.99 mph Half mile - 21 secs. = 85.71 mph. OHC. Bentley - B 56 BN.{W.O. Bentley / Mr Barrington} Lap. - 1.52.2. 88.78. mph. Half. mile 19.7. 91.37 " Rm{William Robotham - Chief Engineer}/D | ||