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 car performance and noise using an 11/50 ratio with rubber engine mounting versus a standard 25 HP car.
| Identifier | ExFiles\Box 102\4\ scan0053 | |
| Date | 7th January 1930 | |
| -3- HS{Lord Ernest Hives - Chair}/A.L.1/A.L.7.1.30.Contd. and is slightly more fussy, when using the 11/50 ratio, but even so with the rubber engine mounting the car is smoother and less noisy than the present standard 4.75:1 compression 25 HP. car. HS.{Lord Ernest Hives - Chair}/A.JL. | ||