Weight comparison between the 25/30 and Wraith chassis models, detailing weight increases.
| Identifier | ExFiles\Box 10\5\ 05-page095 | |
| Date | 30th August 1938 | |
| 658 also 558 To By. {R.W. Bailey - Chief Engineer} c. to Rm {William Robotham - Chief Engineer} /FD. {Frank Dodd - Bodies} Rm {William Robotham - Chief Engineer} /Cr. {Mr Cra’ster / Mr Chichester} 9/JH.30.8.38. | 25/30 | Wraith. Chassis complete with oil, water, and horns, (production weights) | 2720 | 2830. Petrol | 135 | 135 Battery | 80 | 73 Spare wheel and tyre. | 65 | 65 Spares and tools (including lamps) | 59 | 59 | 3059 lbs. | 3162 lbs. Front Bumpers (not standard on 25/30). | 25 | | 3084 lbs. | 3162 lbs. Increase in weight since the Wraith chassis was first weighed are as follows. Brake drums. | 42 Heavier top bonnet panels. | 6 1/2 Battery | 6 Clutch mechanism | 2 Rear engine mounting | 14 Front engine mounting | 8 Cont'd. {John DeLooze - Company Secretary} | ||
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).