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 test data sheet for an Alfa-Romeo 17/95 1750cc engine.
| Identifier | ExFiles\Box 124\5\ scan0022 | |
| Date | 1st January 1932 guessed | |
| ENGINE:- ALFA-ROMEO TYPE:- 17/95 1750CC's BORE 65 M/M, STROKE 88 M/M, CAPACITY 1750 CC's. Main Performance Table: | R.P.M | B.H.P (OPEN EXH.) | B.M.E.P. (OPEN EXH.) | INDUCTION PIPE CONDITIONS (PRESS INS.HG.) | INDUCTION PIPE CONDITIONS (TEMP °C) | CONSUMPTION (PTS/HR) | CONSUMPTION (PTS/B.H.P./HR) | COMPRESSION PRESSURE LBS/O" | MECHANICAL EFFICIENCY % | IGNITION TIMING | |---|---|---|---|---|---|---|---|---|---| | 500 | - | - | - | - | - | - | - | - | - | | 1000 | 14.5 | 107.8 | +3.750 | 24 | 10.45 | .698 | 110.0 | 91.0 | | | 1500 | 24.4 | 120.8 | +6.100 | 30 | 17.30 | .692 | 120.5 | 88.5 | | | 2000 | 35.2 | 130.2 | +7.850 | 33 | 24.70 | .690 | 133.0 | 84.0 | | | 2500 | 45.7 | 135.1 | +9.350 | 39 | 31.20 | .666 | 139.0 | 81.0 | | | 3000 | 56.3 | 139.0 | +10.900 | 42 | 37.20 | .661 | 144.5 | 78.6 | | | 3500 | 65.1 | 138.0 | +11.550 | 44 | 44.10 | .680 | 150.0 | 78.2 | | | 4000 | 72.5 | 134.0 | +11.700 | 45 | 52.0 | .717 | 152.5 | 77.5 | | | 4400 | 76.1 | 128.0 | +11.800 | 45 | 57.70 | .750 | - | - | | THROTTLE METERING CURVE: | R.P.M. | B.H.P. | Pts./HR. | Pts/B.H.P./HR | |---|---|---|---| | 825 | 1.20 | 4.17 | 3.480 | | 1075 | 2.69 | 5.40 | 2.010 | | 1250 | 4.03 | 8.35 | 2.070 | | 1300 | 4.60 | 10.30 | 2.240 | | 1475 | 6.60 | 10.85 | 1.645 | | 1650 | 9.10 | 13.10 | 1.440 | | 1950 | 13.40 | 16.70 | 1.245 | | 2250 | 20.60 | 22.00 | 1.070 | | 2550 | 27.60 | 25.70 | .930 | | 2750 | 35.20 | 28.90 | .822 | | 2975 | 42.70 | 31.40 | .735 | | 3150 | 49.50 | 34.20 | .691 | | 3300 | 55.70 | 38.80 | .696 | | 3500 | 64.90 | 44.30 | .683 | BAROMETER 778 M/M AIR TEMP. (INTAKE) 12°C WHEN TAKING POWER & BOOST FIGURES VALVE TIMING (.014 TAPPET CLEARANCE) INLET OPENS 1.3° BTDC. EXHAUST OPENS 46.0° BBDC. INLET CLOSES 59.0° ABDC. EXHAUST CLOSES 15.8° ATDC IGNITION TIMING, FULL ADVANCE ON HAND CONTROL = 19.5° B.T.D.C. VALVE LIFT (NO TAPPET CLEARANCE) INLET = .305 EXHAUST = .305 ALL TESTS RUN WITH TAPPETS SET AT .014 Handwritten note on right margin: +448~ | ||