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).
Comparative table of weights for various car sections across different models.
| Identifier | ExFiles\Box 107\4\ scan0140 | |
| Date | 11th February 1936 | |
| -2- Hs{Lord Ernest Hives - Chair}/Std.19/KW.11.2.36. Section of Car | Ph.III | 20/25 | Bentley | Buick ---|---|---|---|--- Brake Transmission. Includes pedal, hand brake lever, all cables, equalisers, rods, etc. up to axles, but not servo or drive. | 27.3 | 39.0 | 41.3 | 12.5 Steering - complete with pendulum lever and s.s. tube. | 54.2 | 44.0 | 47.5 | 34.3 Radiator. Includes shell etc. and in case of Ph.III, lamp supports, but no water. | 130.0 | 100.0 | 74.2 | - Dashboard. Complete with all electrical and other fittings except Bijur pump, petrol pumps or autovac. | 57.0 | 50.8 | 58.0 | Bonnet. (Shuttered in case of Ph.III & 20/25, louvred for Bentley & Buick). | 67.0 | 46.5 | 44.0 | 46.0 Engine Unit & Gearbox. Includes all fittings such as carbs., air silencer, servo & drive, ind. pipes, dampers (torque reaction), but not exhaust manifold except in case of Buick. | 1132.3 | 710.0 | 683.0 | 707.0 Propellor Shaft Assembly. Includes prop. shaft damper, etc. | 24.3 | 38.5 | 39.8 | Included withrear axle weight. Exhaust System. Includes all pipes, boxes etc., & includes manifolds etc. except in case of Buick, which is included with engine. | 151.7 | 83.0 | 63.0 | 23.0 | ||