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).
Comparison of frame specifications between a General Motors 1937 frame and a Phantom III frame.
| Identifier | ExFiles\Box 94\4\ scan0081 | |
| Date | 19th August 1936 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} x32) 19.8.36. Frame Comparisons. | | Weight of frame with cross member & front pan only. | Wheel Base. | Max. width of frame. | overall length of frame. | |---|---|---|---|---| | General Motors 1937 frame. | 322 lbs. 8 ozs. | 10' - 2" Approx. | 44.25" | 15' - 8" | | R.R. Phantom III frame. | 483 lbs. | 11' - 10" | 47.125" | 16' - 1¼" | Hs{Lord Ernest Hives - Chair}/F.{Mr Friese} Dodd. | ||