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 comparison sheet for various vehicle components across three different wheelbase models.
| Identifier | ExFiles\Box 125\1\ scan0335 | |
| Date | 8th June 1937 guessed | |
| -2- 124" 131" 138" (346 cu.in) 60 70 85 (368 cu.in) EXHAUST SYSTEM. . . . . . . . . . . . . . 45.94 49.15 64.29 NOT INCLUDING MANIFOLD. WHEELS & TYRES (4) . . . . . . . . . . . . 219 266 304 STEEL WHEELS. TRANSMISSION. . . . . . . . . . . . . . . GEAR SHIFT CONTROL . . . . . . . . . . . . 2.52 2.52 2.52 BOX WITH OIL . . . . . . . . . . . . . . 71 73 73 FUEL SYSTEM. . . . . . . . . . . . . . . . 24.6 31.8 33.52 TANK GAUGE PIPE. WATER CARRIED . . . . . . . . . . . . . . 52 52 35 SHEET METAL FENDERS FRONT . . . . . . . . . . . . . . 109.32 109.41 109 RUNNING BOARDS . . . . . . . . . . . . . 50 87 90 FENDERS REAR . . . . . . . . . . . . . . 38.7 48.8 48.8 HOOD . . . . . . . . . . . . . . . . . . 54.29 66.02 66 SIDE PANS . . . . . . . . . . . . . . . . 7.5 9.8 7.38 RADIATOR. TANK & CORE (NO WATER) . . . . . . . . . 58 58 58 COMPLETE ASSEMBLY GRILLE SHROUD & MOUNTING . . . . . . . . 112 111 111 ELECTRICAL. BATTERY & LEADS/...................... 47.78 52.8 74.0 WEIGHT OF FUEL . . . . . . . . . . . . . . 132 150 150 INSTRUMENTS & PANEL . . . . . . . . . . . 9.44 17.19 17.73 HEADLAMPS - WITHOUT MOUNTING . . . . . . 14.4 14.4 14.4 DASH & CHASSIS WIRING . . . . . . . . . . 6.97 8.24 8.10 BUMPERS . . . . . . . . . . . . . . . . . 67.4 72.5 72.5 WHEEL CARRIER . . . . . . . . . . . . . . 1.6 1.6 1.6 CYL. BLOCK & CRANKCASE . . . . . . . . . 277.7 277 256 12-cyl Alum. Case. | ||