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 chassis weights for Spectre, Phantom, and 20/25 HP models.
| Identifier | ExFiles\Box 18\1\ Scan068 | |
| Date | 9th August 1934 | |
| Ho/Rm{William Robotham - Chief Engineer} COPY x7840 9.8.34. COMPARATIVE CHASSIS WEIGHTS SpectreCodename for Phantom III - Wheelbase 11' 10" 1 ton 10 cwts. 1 qr. 0 lbs. or 3388 lbs. Reduction in weight as compared with Long type Phantom. - 445 lbs. Reduction in weight as compared with Short type Phantom. - 394 lbs. Phantom - Long type - Wheelbase 12' 6" 1 ton 14 cwts. 0 qrs. 25 lbs. or 3833 lbs. Phantom - Short type - Wheelbase 12' 0" 1 ton 13 cwts. 3 qrs. 2 lbs. or 3782 lbs. 20/25 HP. - Wheelbase 11' 0" 1 ton 4 cwts. 3 qrs. 12 lbs. or 2784 lbs. The above figures are for chassis complete with oil, water, tyres, bonnet and battery etc., but without luggage grid, bumpers, or spare wheels. | ||