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).
Specifications for springing, car weight, and clearances for model 25-EX.
| Identifier | ExFiles\Box 17\1\ Scan017 | |
| Date | 7th March 1931 guessed | |
| 25-EX. Springing. Front Springs. Piece No. F.78797. N.S. O.S. Loaded lbs. 1080 1096 Loaded camber. Flat Flat. Initial camber. 4.45" 4.50" Rear Springs. Piece No. F.79449. N.S. O.S. Loaded lbs. 1320 1320. Loaded camber. Flat Flat. Initial camber. 10.30" 10.25" Damper Loads. Front. - 110/110 lbs. No leak. Rear. - 90/90 lbs. H.P. valves drilled 2 holes .038" dia. Car Weight. (Unladen) One spare wheel at rear. Front. 21 cwt 3 qrs 7 lbs. Rear. 27 cwt 0 qrs 14 lbs. Total. 48 cwt 3 qrs 21 lbs. Buffer Clearances. N.S. O.S. No Passengers. Front 1.9" 2.2" Rear 5.1" 5.5" 4 Passengers. Front. 1.8" 2.0" Rear 4.1" 4.4" | ||