ITALIAN ENGINE EVOLUTION (Only Most Significative Military Or Racing Engines) (By Sibboh)
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ITALIAN ENGINE EVOLUTION (only most significative military or racing engines) (by Sibboh) 1923 1924 1925 1926 1927 1928 1929 ALFA ROMEO AS.3 AS.5 ───→ A.20 ───→ ───→ FIAT AS.2 ───→ A.19 A.22 ───→ ───→ ───→ A.24 ───→ ───→ A.25 ISOTTA ───→ ───→ ───→ Asso 500 ───→ FRASCHINI Asso 750 ───→ ───→ PIAGGIO REGGIANE 1930 1931 1932 1933 1934 1935 1936 1937 Mercury ───→ ───→ ───→ ──→ Alfa 135 ALFA ROMEO Pegasus ───→ Alfa 125 Alfa 126 ──→ Alfa 127 ───→ ───→ A.33RC ───→ ───→ ───→ A.30RA bis ───→ A.24T ───→ ───→ AS 6 ───→ ───→ ───→ ───→ FIAT A.30RA ───→ ───→ A.24R ───→ A.26 R A.55 G&R 14K A.58RC A.78RC P&W Hornet A.59RC A.76RC ───→ ───→ A.80RC ───→ ───→ ISOTTA Asso caccia ───→ ───→ ? FRASCHINI ───→ ───→ Asso 750 ───→ ───→ ───→ ───→ ───→ Asso 750 RC ───→ Asso XI RC ───→ ───→ Asso XI Spinto L.120 Delta ───→ ───→ PIAGGIO P.IX ? ───→ P.X P.XI P.XI bis REGGIANE 1937 1938 1939 1940 1941 1942 1943 Alfa 135 ───→ ───→ ALFA ROMEO ───→ Alfa 127 Alfa 128 ───→ ───→ inizio produzione ───→ DB601Aa Alfa 101 ───→ A.38 ───→ A.44 ? FIAT A.76RC ───→ ───→ A.75 A.76 A.80RC ───→ ───→ ───→ A.82 A.83 A.84 ? Asso 750 RC progetto L.180 ISOTTA Asso XI Spinto Asso L.121 FRASCHINI ───→ ───→ ───→ progetto L.122 ───→ ───→ Sigma? L.120 Delta ───→ Gamma ? ───→ Zeta ? ───→ ───→ P.XVI ───→ ───→ ───→ ───→ P.X ───→ ───→ ───→ ───→ ───→ PIAGGIO ───→ P.XI bis P.XIX ───→ P.XII ───→ ───→ ───→ ───→ P.XV ? P.XXII ───→ REGGIANE RE 103 RC ───→ progetto RE 104 Alfa Romeo Engines Engine Engine First run - year Continuous Power Fuel Version Altitude CV/L (displacement) configuration (introduction) output Grade R9 RC35 1934 650 cv 3500 m 22.7 cv/l ? Alfa 125 (28.628 L) air cooled RC10 1934 710 cv 1000 m 24.8 cv/l ? R9 RC34 1935 750 cv 3400 m 26.2 cv/l 87 ? Alfa 126 (28.628 L) air cooled RC10 1935 800 cv 1000 m 27.9 cv/l 87 ? R9 RC55 1937 700 cv 5500 m 24.5 cv/l 87 Alfa 127 (28.628 L) air cooled RC50 1937 700 cv 5000 m 24.5 cv/l 87 R9 RC18 1937/38 860 cv 1800 m 30.0 cv/l 87 Alfa 128 (28.628 L) air cooled RC21 1937/38 860 cv 2100 m 30.0 cv/l 87 Alfa 129 (28.628 L) R9 air cooled RC42 1942/43 940 cv ? 4200 m 32.8 ? cv/l 87 R9 1400 m 32.8 cv/l Alfa 131 (28.628 L) RC14/50 1942/43 940 cv 87 air cooled 5000 m 32.8 cv/l R18 RC32 1934-37 1410 cv 3200 m 28.4 cv/l 87 Alfa 135 (49.722 L) air cooled RC45 ? ? 4500 m ? 87 R18 RC25 project 1939-40 ? 1850 cv 2500 m 37.2 cv/l ? Alfa 136 (49.722 L) air cooled RC65 project 1939-40 ? 1650 cv 6500 m 33.2 cv/l R18 2300 m ? Alfa 138 (57.256 L) RC23/65 experimental ? ? air cooled 6500 m ? RC80 1800 cv 8000 m 35.8 cv/l Alfa 101 or AR.1101 R28 (R7x4) 1942 ? cv ? m ? cv/l (50.24 L) liquid cooled RC?/86 (project 1937/38) 1750 cv 8600 m 34.8 cv/l Alfa 101 o AR.1101 R28 (R7x4) project RC 80 2100 cv 8000 m ? maggiorato (? L) liquid cooled (a bigger version) Racing Engines - FIAT Engine Engine First run - year Power output Version Altitude CV/L Fuel Grade (displacement) configuration (introduction) (Max) AS.2 (31.4 L) V12 - 1925 882 cv ? 28.1 cv/l AS.3 (34.6 L) V12 - 1927 1000 cv ? 28.9 cv/l AS.5 (25.128 L) V12 - 1929 1000 cv ? 39.8 cv/l - 1931 2300 cv (2800 cv) ? 45.8 cv/l (55.7 cv/l) AS.6 (50.256 L) V24 - 1934 2850 cv (3100 cv) ? 56.7 cv/l (61.7 cv/l) AS.8 (34.482 L) V16 - 1939/40 2250 cv ? 65.3 cv/l AS.5 was the basis for the A.30 and its family. AS.6 was realized with 2 AS.5. Racing Engines - ISOTTA FRASCHINI I-500 (Asso 500 V12 - 1929 1050 cv ? 37.9 cv/l modified) (Asso 500 V12 - 1929 850 cv ? 30.7 cv/l modified) M2-800 (Asso W18 - 1929 1400/1800 cv ? 24.4/31.4 cv/l 1000 modified) FIAT Engines Engine Engine First run - year Continuous Version Altitude CV/L Fuel Grade (displacement) configuration (introduction) Power output A.15 (18.696 L) V12 R 1918 300 cv ? 16.0 cv/l A 15 (20.357 L) V12 R bis 1919-20 450 cv ? 22.1 cv/l (bore longer) A 19 (9,782 L) V12 - 1923 290 cv 3500 m 29.6 cv/l A.20 (18.696 L) V12 - 1926 410 cv ? 21.9 cv/l A.22 (27.9 L) V12 - 1926 550 cv ? 19.7 cv/l - 1926 ? ? ? A.24 (32.327 L) V12 R 1931 ? ? ? T 1935 ? ? ? A.25 (54.48 L) V12 - 1927 900 cv ? 16.5 cv/l RA 1930 ? A.30 (24.047 L) V12 RA bis 1933 550 cv 2750 m 22.9 cv/l 94 (2750 rpm) A.33 (24.047 L) V12 RC35 1935-37 700 cv 3500 m 29.1 cv/l 80 (2600 rpm) A 26 (32.327 L) V12 R 1932 ? ? ? 1200 cv 1500 m 34.6 cv/l A.38 (34.7 L) V16 RC15/45 1940-41 1200 cv 4500 m 34.6 cv/l ? 2000 m ? A.40 (52.01 ? L) X24 RC20/60 ? ? 6000 m ? ? 1500 m ? A.44 (69.4 L) X32 RC15/45 ? ? 4500 m ? A.55 (17.241 L) R7 - 1932 ? ? ? A.59 (27.689 L) R9 RC 1934 700 cv 2100 m 25.3 cv/l (P&W Hornet licence) Engine Engine First run - year Continuous Version Altitude CV/L Fuel Grade (displacement) configuration (introduction) Power output A.78 (27.689 L) R9 RC 1935 660 cv 3500 m 23.8 cv/l (A.59 evolution) A.58 (38.673 L) R14 RC 1934 870 ? cv 3200 ? m 22.5 cv/l (G-R 14K licence) RC18 1935 900 cv 1800 m 28.8 cv/l A.74 (31.249 L) R14 RC38 1935 840 cv 3800 m 26.9 cv/l RC42 1938 ? cv 4200 m ? A.75 (31.249 L ?) R14 RC53 1940 ? 5300 m ? A.76 (33.404 L) 1941 R14 RC40 1000 cv 4000 m 29.9 cv/l (project 1937-38) ? 2400 m ? A.77 (33.404 L ?) R14 RC24/52 1942 ? ? 5200 m ? RC20 1935 1070 cv 2000 m 22.7 cv/l A.80 (45.72 L) R18 RC41 1935 1000 cv 4100 m 21.9 cv/l RC42 ? ? 4200 m ? 1942 A.82 (47.105 L) R18 RC 42 1250 cv 4200 m 26.5 cv/l (project 1937) ? 2400 m ? A.83 (47.105 ? L) R18 RC24/52 ? ? 5200 m ? A.84 (47.105 ? L) R18 RC40 ? ? 4000 m ? ISOTTA FRASCHINI (from 1932 in the Caproni industy group) Engines Engine Engine First run - year Continuous Version Altitude CV/L Fuel Grade (displacement) configuration (introduction) Power output - 1925 ? ? ? Asso 500 R ? ? ? ? V12 (27.709 L) AQ ? 420 cv 5000 m 15.2 cv/l RA ? ? ? ? Asso Caccia V12 - 1930 ? ? ? (20.617 L) air cooled RC15 1934 880 cv 1500 m 27.4 cv/l RC40 1935 840 cv 4000 m 26.1 cv/l Asso XI V12 RC45 1936 800 cv 4500 m 24.9 cv/l (32.144 L) RC40 "spinto" 1936 900 cv 4000 m 28.0 cv/l R2C15 1937 908 cv 1500 m 28.2 cv/l Asso L.121 V12 RC40 1937-38 900 cv 4000 m 28.0 cv/l (32.144 L) Asso L.122 never realized V12 RC50 1000 cv 5000 m 31.1 cv/l (32.144 L) (project 1938) RC40 1936-37 ? 4000 m ? RC35 1938 700 cv 3500 m 26.6 cv/l RC40 1938 750 cv 4000 m 28.5 cv/l Asso L.120 Delta V12 800 cv 1600 m 30.4 cv/l (26.275 L) air cooled RC16/40 1940 ? 800 cv 4000 m 30.4 cv/l 800 cv 1700 m 30.4 cv/l RC17/50 1941 ? 800 cv 5000 m 30.4 cv/l Engine Engine First run - year Continuous Version Altitude CV/L Fuel Grade (displacement) configuration (introduction) Power output 2000 m 30.4 cv/l RC20/55 1942 800 ? cv 5500 m 30.4 cv/l Asso L.120 Delta V12 ~ 750 cv 2100 m ~ 28.5 cv/l RC21/60 1942/43 (26.275 L) air cooled ~ 750 cv 6000 m ~ 28.5 cv/l ~ 750 cv 3000 m ~ 28.5 cv/l RC30/70 1942/43 ~ 750 cv 7000 m ~ 28.5 cv/l Gamma V12 RC35 1939 ? 520 cv 3500 m 27.2 cv/l (19.14 L) air cooled Zeta (38.28 L) X24 RC42 1941? 1250 cv 4200 m 32.6 cv/l double Gamma air cooled Sigma (52.55 L) X24 ? ? ? ? ? double Delta air cooled - 1927/34 ? ? ? Asso 750 W18 RC35 1933 870 cv 3500 m 18.5 cv/l (47.105 L) RC40 1934 ? 3700 m ? Asso 1000 W18 - 1929 ? ? ? ? (57,26 L) 1450 cv or 30.8 cv/l Asso L.180 project 1938 ? 1500 cv or 31.8 cv/l W18 RC? ? (47.105 ? L) never realized 1750 ? cv or 37.1 ?? cv/l 1800 ? cv 38.2 ?? cv/l PIAGGIO Engines Engine Engine First run - year Continuous Version Altitude CV/L Fuel Grade (displacement) configuration (introduction) Power output PIX (24.861 L) R9 1930 ? 600 cv ? 24.1 cv/l (G-R 9K licence) R 1935 700 cv 1000 m 28.2 cv/l PX (24.861 L) R9 P ? ? ? ? RC35 ? ? 3500 m ? PXVI (24.861 L) R9 RC35 1938 650 cv 3500 m 26.1 cv/l G-R 14Krs (licence) R14 ? 1934 870 ? cv 3200 ? m 22.5 cv/l RC50 1935 ? 5000 m ? RC30 1935 ? 3000 m ? RC40 1936 1000 cv 4000 m 25.9 cv/l 87 RC72 1936 ? 7200 m ? RC40 bis 1937 1000 cv 4000 m 25.9 cv/l 87 PXI (38.673 L) R14 C40 1937 ? 4000 m ? RC44 1937 ? 4400 m ? RC15 1937 ? 1500 m ? RC100/2v 1937 ? 10000 m ? RC60 ? ? 6000 m ? RC45 1940 1160/1180 cv 4700 m 30.0/30.5 cv/l 92 PXIX (38.673 L) R14 RC60 1941 ? ? 6000 m ? 92 PXII (53.01 L) R18 RC35 1938 1350 cv 3500 m 25.5 cv/l 87 PXV (53.01 L) R18 RC several 1941/42 ? 1450-1500 cv several 27.3-28.3 cv/l 87 ? PXXII (53.01 ? L) R18 RC several 1942/43 ? 1500-1600 cv several 28.3-30.2 cv/l 87 ? REGGIANE (from 1935 in the Caproni industry group) Engines Engine Engine First run - year Continuous Version Altitude CV/L Fuel Grade (displacement) configuration (introduction) Power output RE 101 never inverted ? W12 RC50 I 1100 cv 5000 m 41.0 or 41.35 cv/l 100 ? (26.8L or 26.6L?) (project 1940) never RE 102 (34 L) inverted ? W18 RC50 I 1350 cv 5000 m 39.7 cv/l 100 ? (project 1940-41) never 1540 cv 1500 m 38.6 cv/l RE 103 (39.9 L) inverted W18 RC40 I 87 (project 1940-41) 1500 cv 4000 m 37.6 cv/l 1640 cv 1500 m 41.1 cv/l 1942-43 RE 103 (39.9 L) inverted W18 RC50 I 1620 cv 3250 m 40.6 cv/l 100 (project 1940-41) 1600 cv 5000 m 40.1 cv/l RE 104 (32.144 L) never V12 RC38 1000 cv 3800 m 31.1 cv/l 87 (modified Asso L.121) (project 1941) 1540 cv 1500 m 38.6 cv/l never 1500 cv 5000 m 37.6 cv/l RE 105 (39.9 L) inverted W18 RC100 I 87 ? (project 1941-42) 1390 cv 7750 m 34.8 cv/l 1310 cv 10000 m 32.8 cv/l RE ? (53.2 L) never X(?)24 RC60 I 2200 cv 6000 m 41.35 cv/l 100 ? (RE 103 derivative) (project 1942) http://www.webalice.it/paolo.riatti/motori.html Bibliography: Sergio Govi (author), 1985, "I Reggiane dall'A alla Z.