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 table comparing kerb weight, axle weight, and speed ratios for various car models.
| Identifier | Morton\M18\ img019 | |
| Date | 20th November 1930 | |
| O.P.M. ETC. | CAR. | KERB WT. (CWTS.) | APPROXIMATE AXLE WT. | [illegible header] | REAR AXLE RATIO | TRANSLATED ROAD SPEED (M.P.H.) / 1000 R.P.M. OF ENGINE | |---|---|---|---|---|---| | 10-H.P. | 21.0 Lbs. | [illegible] | 1.00 | 3.6 | [illegible] | | 15-H.P. | 33.02 Lbs. | 20 cwt. | 1.30 | 3.6 | 3.7 | | 50-H.P. O'seas Model. | 53.0 Lbs. | 27 cwt. | 1.320 | 3.7 | 3.82 | | 58-GN. | [illegible] | 27.35 | 1.320 | 3.66 | 3.6 | | 25-H.P. O'seas Model. | .460 | 27.125 | 1.315 | 3.75 | 3.6 | /W . 20 . 11 . 30 . | ||