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 comparison table for various fuel injector nozzles at 1500 RPM.
| Identifier | WestWitteringFiles\U\January1930-April1930\ Scan120 | |
| Date | 24th May 1930 guessed | |
| Particulars of Nozzle. Make & Type. | No. of Spray Holes | Spray Cone Angle. | RPM. | BMEP. | BHP. | IMEP. | IHP. | Approx. Max. Cyl. Press. lbs/sq. in. | Fuel Cons. lbs/min. | Injection advance. (Before TDC.) (DL130 Bosch T174) | 5 | 130° | 1500 | 67.2 | 23.7 | 104.2 | 37.0 | 730 | .276 | 33° (DL140 Bosch T114) | 5 | 140° | 1500 | 69.0 | 24.4 | 106.0 | 37.6 | 730 | .272 | 32° (DL140 Bosch T147) | 5 | 140° | 1500 | 68.0 | 24.1 | 105.0 | 37.3 | 730 | .256 | 33° (DL140 Bosch T168) | 5 | 148° | 1500 | 71.5 | 25.3 | 108.5 | 38.4 | 730 | .261 | 33° (DL130 Bosch T147) | 5 | 130° | 1500 | 65.4 | 23.1 | 102.4 | 36.4 | 730 | .270 | 32° (DL130 Bosch T182) | 5 | 130° | 1500 | 72.8 | 25.8 | 110.0 | 39.0 | 730 | .262 | 27° R.R. (.015" holes) | 4 | 110° | 1500 | 69.0 | 24.4 | 106.0 | 37.4 | 730 | .268 | 35° | ||