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).
Graph comparing the acceleration performance of the 22 Ex and 25 Ex models.
| Identifier | ExFiles\Box 155\1\ scan0034 | |
| Date | 19th July 1932 | |
| ACCELERATION. 22 EX. AND 25 EX. ACCEL: FT/SEC./SEC. SPEED - M.P.H. 22 EX. (50 1/4 CWT) SEMI EXP CARB, 114° E.82448 CAMSHAFT 5.25 C/R 11/41 AXLE 25 EX (48 3/4 CWT) STD. CARB. STD. CAMSHAFT 5.00 C/R 11/41 AXLE TYRES 7.00 x 20 TESTS ON 19-7-32 WITH BOTH CARS LOADED TO SAME WEIGHT | ||