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 component weights for various car models.
| Identifier | ExFiles\Box 88\3\ scan0186 | |
| Date | 11th February 1936 | |
| -3- Hs{Lord Ernest Hives - Chair}/Std.19/KW.11.2.36. Section of Car | Ph.III | 20/25 | Bentley | Buick --- Petrol Tank - includes gauges, fittings, etc., but no petrol. | 53.1 | 49.0 | 46.0 | 18.5 Petrol Connections - includes pipes, filter & autovac or pumps. | 12.3 | 14.0 | 10.7 | - Battery - includes box and fittings. | 108.3 | 83.3 | 74.0 | 45.3 Undershields, apron etc. | 9.5 | 15.0 | - | 14.0 Spare Wheel Carrier. | 23.5 | 20.0 | Part of Body | Part of Body Lamp Pillars & Sockets. | Included with Radiator. | 8.0 | 10.5 | - Tool Kit - includes tools, spares, Jacks etc. | 58.0 | 35.0 | 31.8 | 8.0 Jacks - (where fitted to car and not included in tool kit). | 23.2 | 30.2 | Included in Tool Kit. | Included in Tool Kit. Luggage Grid. | Part of Body | 21.3 | Part of Body | Part of Body Miscellaneous Items - Clutch & accelerator Pedals, Starting Handle, Bijur pump, water connections, Lamps, Horns. | 50.0 | 60.0 | 60.0 | - Water - contained in engine and radiator. | 54.0 | 36.0 | 28.2 | - | ||