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).
Car performance, including acceleration tests up Ticknall Hill and comparisons with other vehicles.
| Identifier | ExFiles\Box 39\2\ Scan227 | |
| Date | 10th May 1928 guessed | |
| contd :- -2- any attempt to isolate the scuttle and dash. There is the usual automatic advance in the distributor head. As a generalisation the engine is as unobtrusive as any 6-cyl. we have tried, though [strikethrough] not as silken on the overrun as the Stutz. We did not reach the master period on the lower gears, but did not push the car to its utmost limit as it was new. CAR PERFORMANCE. The performance of the car is of great interest, taking into consideration the fact that it has all the attributes of a town carriage. Its acceleration on direct drive is approx. equal to that of a standard 15-tooth Phantom on 3rd. This is about what one would expect from its weight, axle ratio and compression ratio. Times up Ticknall Hill are as follows :- Std. Phantom 53 cwts. 15/52 axle. Top gear. 63 secs. EAC.7 14-EX (Le CanadelHenry Royce's French residence car) " 55 secs. '72' Red head Sedan 5-seater Chrysler." 51 2/5 secs. Phantom - 3rd. gear. 51 secs. The maximum speedof the car as far as we could judge would be between 70 and 75 m.p.h. or say 3,350 engine r.p.m. One objectionable feature is a pronounced engine roar from 40 m.p.h. upwards, this made the engine sound somewhat fussy. No low geared car ever reproduces the effortless feeling of a Phantom with a 16 or 15-tooth axle when touring from 40-50 m.p.h. The Chrysler ran smoothly at 3 m.p.h. on top gear. contd :- | ||