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).
Table of engine capacities, horsepower ratings, and corresponding tax calculations.
| Identifier | ExFiles\Box 148\2\ scan0215 | |
| Date | 14th June 1939 | |
| Table Headers: CU INS | LITRES | R.A.C.HP. | TAX AT £1·5·0 Row 1: 4 CYL - 3"x4" | 113 | 1.850 | 14.4 | £18-15-0 Row 2: 4 CYL - 3½"x3¾" | 144 | 2.360 | 19.6 | £25 Row 3: do - 3½"x4½" | 173 | 2.838 | 19.6 | £25 Row 4: 6 CYL - 3"x4" | 170 | 2.780 | 21.6 | £27-10-0 Row 5: 6 CYL 3¼"x4½" | 224 | 3.670 | 25.4 | £32-10-0 Row 6: do 3½"x4½" | 260 | 4.256 | 29.4 | £37-10-0 Row 7: 8 CYL 3"x4" | 226 | 3.700 | 28.8 | £36-5-0 Row 8: do 3¼"x4½" | 298 | 4.888 | 33.75 | £42-10-0 Row 9: do 3½"x4½" | 347 | 5.675 | 39.2 | £50 Left side groupings: 4, 6, 8 Bottom faint text: ENGINES & TAX EmG H.W.39 PD159 Stamp: ROLLS-ROYCE LTD, PRINT ROOM, 14 JUN 1939, 52159 | ||