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 graph comparing a twin carburettor induction system with a standard A1 carburettor system.
| Identifier | ExFiles\Box 13\2\ 02-page136 | |
| Date | 20th January 1931 | |
| TWIN R.R. CARBS AND INDUCTION SYSTEM COMPARISON WITH STANDARD A1 CARBURETTOR AND INDUCTION SYSTEM TEST BED EXHAUST SYSTEM V1023 BHP BMEP RPM TWIN CARBS 1.35 DIA CHOKES TWIN CARBS 1.30 CHOKES TWIN CARBS 1.25 DIA CHOKES STANDARD A1 CARB INDUCTION H.D 20.1.31 | ||