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).
Comparative performance graph showing Torque and M.E.P. curves for Bentley, Oldsmobile, and a 30 HP RR engine.
| Identifier | ExFiles\Box 134\2\ scan0124 | |
| Date | 1st July 1937 guessed | |
| COMPARITIVE CURVES OF 25/30 BENTLEY AND OLDSMOBILE ① 4 1/4 BENTLEY - 6.4 : 1 C.R. BORE 3.5" STROKE 4.5" CAPACITY 259.5 c.i ② F37 - 6 CYL - OLDSMOBILE - 6.1 : 1 CR{Mr Cra???ster / Mr Chichester} BORE 3.438" STROKE 4.125 - 229.7 c.i ③ 30 HP - RR - 5.9 : 1 C.R. BORE 3.5" STROKE 4.5" CAPACITY 259.5 c.i ALL CURVES CORRECTED TO 15°C - 760 M/M BAR OPEN EXHAUST M.E.P. (LBS / □") TORQUE LBS FT R P M TORQUE M.E.P. | ||