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).
Graphical comparison of rebored cylinder block wear and piston mileage across different series.
| Identifier | ExFiles\Box 103\2\ scan0094 | |
| Date | 31th March 1938 | |
| PERCENTAGE OF EACH SERIES REBORED A B C D E F G H AVERAGE WEAR 1/1000" SPLIT SKIRT PISTONS AVERAGE MILEAGE BEFORE REBORE 33,000 MILES. AEROLITE PISTONS. AVERAGE MILEAGE BEFORE REBORE 22,000 MILES. A B C D E F G H SERIES AVERAGE WEAR PER 30,000 MILES OF REBORED CYLINDER BLOCKS V/. 31.3.38 | ||