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 comparison report from a Ticknall Hill Test for various cars including Essex, Dodge, and Buick.
| Identifier | ExFiles\Box 124\3\ scan0105 | |
| Date | 22th December 1920 | |
| X3317 22.12.20. TICKNALL HILL TEST - DRIVER AND PASSENGER. 300 lbs. in rear - starting at 10 M.P.H. top gear. Condition of Tests - No wind - dry roads. X.4217. X.4213. X.3317. Lst. Time. M.P.H. 1st. 0 mins. 10 Essex. 1/2 " 31 Car. 1 " 39 1 " 19 1/2 secs. 47 2nd. 0 MINS. 10 Essex. 1/2 " 30 Car. 1 " 37 1 " 24 secs. 46 1st. 0 mins. 10 Dodge 1/2 " 27 CAR. 1 " 30 1/2 1 " 27 1/2 secs. 35 2nd. 0 " 10 Dodge. 1/2 " 28 Car. 1 " 32 1/2 1 " 24 secs. 36 1st. 0 mins. 10 Buick 1/2 " 22 Car. 1 " 26 1/2 1 " 47 secs. 34 Contd. | ||