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).
Power-output graph for a 3 1/2-Litre Bentley, comparing 1934 and 1935 Ulster T.T. models.
| Identifier | ExFiles\Box 90a\3\ Scan092 | |
| Date | 1st July 1935 | |
| 3 1/2-LITRE BENTLEY POWER-OUTPUT JULY. 1. 1935 ① ULSTER T.T. - 1934 ② " " - 1935 B.H.P B.M.E.P. R.P.M. | ||