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).
Weight analysis of car body components and a comparison of overall vehicle weights.
| Identifier | ExFiles\Box 88\3\ scan0224 | |
| Date | 24th November 1936 | |
| -2- Luggage flap ........ 6½ lbs. Wheel well .......... 7 lbs. Extra Glass ......... 1 lb. Wider body .......... 16 lbs. Plate carrying anatomical squab .... 5 lbs. Extra trimming ...... 2 lbs. -------- 97 lbs. We think, therefore, that we may accept that the latest body is about 1½ cwts heavier than the original steel body. The increase in weight due to the new method of carrying the luggage appears to us to be indefensible. As a matter of interest Lp{Mr Lappin}'s car which is a 3½-litre with a Van den Plas body weighs 35 cwts. 1 qr. 0 lbs. By subtraction this gives a body weight of 11 cwts. 3 qrs. We presume that this is well outside the guarantee limit. The attached chart is of some interest in that it shows we have been able to keep the production chassis weight on the 4¼-litre down to within 2% of the original 3½-litre figure in spite of the 16% larger engine. Body weights on the other hand have increased by 27%. Rm.{William Robotham - Chief Engineer} | ||