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).
Specification comparison for a Bentley engine with dry liner construction against standard bore engines.
| Identifier | ExFiles\Box 82\4\ scan0169 | |
| Date | 2nd October 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} x200 Hs{Lord Ernest Hives - Chair}/Smth.6/KW.2.10.35. Bentley with Dry Liner Construction. If the liner is .100 thick, the alum. is .200 thick and leaving .200 between the barrels of the closest cylinders, the specification for the biggest bore engine is as follows. The engine has an alum. head and unit construction block and crankcase. | | Standard 3.250 Bore | Standard 3.500 Bore | Dry Liner | | :--- | :--- | :--- | :--- | | Bore | 3.250 | 3.500 | 3.350 | | Capacity | 3669 | 4260 | 3890 | | Tax | £19 | £22 | £20 | | Nett Weight | 410 | 410 | 310 | | Gross Weight Ø | 587 | 587 | 487 | | Power at 6.4/1 C/R.{Sir Henry Royce} | 115 | 135 | 123 | Ø includes manifolds, flywheel & clutch, starter dynamo, water and oil. Hs{Lord Ernest Hives - Chair}/Smth. | ||