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 test record of a chassis, showing instrument readings from road tests.
| Identifier | ExFiles\Box 113\2\ scan0135 | |
| Date | 25th April 1928 | |
| Chassis No. 11AL 40/50 Passenger: Mr Maddocks, M Wyer Axle ratio 15/52 RETD. Date 25-4-28 Chassis Weight unladen with Total 47 cwt. Conditions Dry, smooth, London Road. 5.0 3rd 6.0 2nd 6.6 1st gear From 10 M.P.H. 15.4. 10MPH. 15.7 20MPH. 16.6 30MPH. 16.5 40 MPH. Instrument thrown out of action Top Gear 3.2 40 MPH 3.3 30 MPH 3.2 20 MPH 4.0 ft.sec/s 10 MPH. | ||