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).
Comparison of straight road speeds between the Hawk-Northcliffe and EAC engines.
| Identifier | WestWitteringFiles\L\Jan1924-March1924\ Scan103 | |
| Date | 8th February 1924 guessed | |
| contd:- -2- Our experience is, that maximum speeds are always disappointing on straight roads, for instance, the Hawk-Northcliffe with an engine which develops more H.P. than the EAC., on the test bench has not equalled the speed obtained on the EAC. HS.{Lord Ernest Hives - Chair} | ||