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 table of weights for front-end chassis components across various car models.
| Identifier | ExFiles\Box 18\1\ Scan080 | |
| Date | 24th April 1936 guessed | |
| CHASSIS FRONT END WEIGHTS. X718 BENTLEY 25 HP. & Ph.II. PARTS, BENTLEY 25 HP. lbs., Ph.II. lbs. Front axle with control (no brakes), 49.5, 60.3 2 road springs, 38.2, 56.4 2 shock dampers, 22.75, 23.0 Engine & Radiator, 10.25, 13.0 Front cross member with forgings, 10.0, 11.5 Rear spring anchorage brackets, 3.25, 3.25 Front shackle, 1.5, 3.5 TOTAL:, 135.45, 171.0 Ph.II, Ph.III & WRAITH PARTS, Ph.II lbs., Ph.III lbs., WRAITH lbs. 2 top triangular levers, 87.5, 17.5, 17.5 2 bottom triangular levers, 78.0, 20.75, 18.0 2 yoke pieces, 23.0, 15.5, 8.5 2 spring pot assemblies, 18.5, 106.25, 105.0 Front cross member, 14.125, 16.4, 15.0 Front pan and rad. support, 7.5, 58.1, 50.0 Centre Stg. lever & x stg. tube, 3.75, 19.5, 16.5 Distance piece & flanges thru'frame, , 26.0, 32.0 TOTAL:, 232.375, 280.0, 262.0 WRAITH TORSION BAR PARTS, lbs. 2 top triangular levers, 14.0 2 bottom triangular levers, 14.0 3 piece cross steering, 22.0 2 shock dampers, 17.0 2 Torsion Bars, 20.0 Rear torsion bar supports, 8.0 Triangle brkts. anchorage to frame, 30.0 1st cross member, 15.0 2nd cross member, 20.0 TOTAL:, 160.0 PACKARD PARTS, lbs. Front cross member, 28.0 Centre Steering Lever, 3.0 2 springs, 22.4 2 Buffers and Pots, 6.06 2 cross steering tubes, 2.44 2 torque arms, 13.5 2 shock dampers with top triangular lever., 31.5 2 jack pads, 2.75 2 spherical housings for torque arm, 6.0 2 suspension arms and yoke pieces, 48.0 TOTAL:, 173.8 | ||