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).
Road test report on a car's performance, noting issues with engine detonation, suspension, steering, and braking.
| Identifier | ExFiles\Box 29\3\ Scan240 | |
| Date | 23th July 1930 guessed | |
| MAYFAIR S. 78. -2- He/24.Z/24.L.T.32.24/14. ENGINE. - The engine was remarkably free from torque reaction and in consequence one was very liable to under estimate its powers of acceleration. There was a crankshaft period when pulling at 40 M.P.H. but this was not very clearly defined. The engine exhibited the usual 8 cylinder characteristics of smoothness on the over-run. In spite of the small mileage covered, the engine detonated at full throttle low speeds when fully advanced. SUSPENSION. - The suspension was most distressing in spite of the double acting hydraulics fitted all round. The car pitched exceedingly badly and the directional stability was negligible at 50 M.P.H. STEERING. - The steering was very free from road shocks, very light and low geared and had no self-centring. There was no sign of "shimmy" or radiator 'jellying'. The directional instability was probably mainly due to the suspension. BRAKES. - These were most inefficient. CLUTCH. - Good, but slack in the transmission. It is unfortunate that this car failed before we obtained all the required information. | ||