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).
Performance graph for the 20 HP flywheel clutch, including chassis weight specifications for various configurations.
| Identifier | ExFiles\Box 5a\5\ 05-page200 | |
| Date | 15th August 1928 | |
| 20 H.P. CHASSIS WTS OIL WATER 14 GALLS PETROL 4 TYRES & WHEELS BATTERY AND SPARE WHEEL CARRIER PRE FRONT WHEEL BRAKES 2483 LBS POST FRONT WHEEL BRAKES 2517 LBS BALLOON TYRES ON POST F.W.B. CAR 20 H.P. FLYWHEEL CLUTCH H.P. C.O. OPEN | ||