Comparison table of vehicle specifications for standard, modified front springs, and modified front springs with an anti-roll bar.
| Identifier | ExFiles\Box 124\4\ scan0027 | |
| Date | 17th July 1941 | |
| Rm {William Robotham - Chief Engineer} /G8.2/T.17.7.41 - 2 - With standard With modified with modified suspension front springs front springs and anti-roll bar. -------------------------------------------------------------------------------------------- Track. 44" Frt. 45" rear Wheelbase. 88.5" Tyre size. 4.50 x 17" Kerb weight per wheel Frt. 400 lbs. Rear 440 " Four passengers wt. sprung: Frt. 413 Rear 567 Front spring rate. 222 lb/inch* 109 lb/inch** Estimated suspension rate. 265 lb/inch 132 lb/inch Measured friction-spring only. 27 lb. Virtual deflection of front 1.56" 3.13" suspension (without tyres). Front spring separation. 20.5" Front roll rate less tyres and 81 lb.ft/deg. 40.4 lb.ft/deg. effects due to spring torsion and asymmetry. Expected roll rate less tyres. 130 lb.ft/deg. 64.5 lb.ft/deg. 238 lb.ft/deg. Front tyre rate. 1000 lb/inch Front track. 44" Front tyre roll rate. 1410 lb.ft/deg Overall front roll rate. 119 lb.ft/deg. 61.5 lb.ft/deg. 204 lb.ft/deg. * measured. ** calculated. | ||
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).