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).
Table of revised matrix weights for various car models and types.
| Identifier | ExFiles\Box 94\3\ scan0008 | |
| Date | 16th April 1935 | |
| 340 Hs{Lord Ernest Hives - Chair}/Std.10/KH.16.4.35. REVISED MATRIX WEIGHTS. Matrix | Weight lbs. | Frontal Area sq. ins. | Depth ins. | Vol. cu. ins. | Wt. / Unit lbs. / vol. cu. ins. --- | --- | --- | --- | --- | --- Bentley old std. Marston Mark III | 38.0 | 470 | 3.305 | 1553 | .0245 Bentley new std. Marston Mark V.{VIENNA} | 31.5 | 470 | 2.285 | 1073 | .0294 Central Mounting Wings & Rad. Bentley Rad. Marston Mark V.{VIENNA} | 28.25 | 401 | 2.285 | 916 | .0309 Std. Shape Bentley, Harrison Vee (U.S.A.) | 26.00 | 470 | 2.060 | 969 | .0269 Std. Shape Bentley, Marston copy of Harrison Vee (U.S.A.) | 33.25 | 470 | 2.285 | 1073 | .0310 Std. 20/25, Marston Mark III | 45.00 | 560 | 3.305 | 1850 | .0243. 20/25, Std. shape Marston Mark V.{VIENNA} | 38.50 | 560 | 2.285 | 1280 | .0278 40/50 - E.85630 (1st type) Harrison Vee (U.S.A.) | 48.00 | 587 | 3.305 | 1940 | .0248 40/50 Latest type Marston Mark V.{VIENNA} | 58.00 | 610 | 3.305 | 2015 | .0288 | ||