ALFA 24 HP
ALFA 24 HP | ||
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Curb weight 1,000 kg (2,205 lb)[1] (torpedo) | | |
Chronology | ||
Predecessor | Darracq 14/16 HP[3] | |
Successor | 20/30 HP |
The ALFA 24 HP is a 4.1-litre
The 24 HP was commercially successful and continued to be developed for a decade. In 1914 some updates transformed the 24 HP into the ALFA 20-30 HP, produced in 1914 and 1915—with some hundred cars assembled after the war in 1920. In turn the 20-30 HP evolved into the 1921–22
In total the 24 HP and 20-30 HP were produced in 680 examples.
History
Background and development
ALFA was born from Società Italiana Automobili Darracq—Milano (SIAD), an unlucky attempt by French manufacturer Darracq and some Italian investors of creating an Italian branch to locally build and sell Darracq cars under license. In Autumn 1909 SIAD
Racing debut
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/1911-05-14_Targa_Florio_A.L.F.A_24_HP_Ronzoni.jpg/220px-1911-05-14_Targa_Florio_A.L.F.A_24_HP_Ronzoni.jpg)
On 14 May 1911 the 24 HP made its racing debut at the 6th
Production and evolution
The 24 HP was sold solely as bare chassis. It was made in five series, named with letters from A to E. The series E introduced in 1914 showed the most significant revisions, so much that the model was renamed ALFA 20-30 HP.
24 HP A, B, C and D
- Series A and B, produced in 1910–11 and 1912 respectively, were of 50 cars each. The engine produced 42 bhp (31 kW) at 2,200 rpm, and these cars could reach 100 km/h (62 mph).[1]
- Series C and D, produced in 1913 and 1914 respectively, were roughly of 100 cars each. These adopted the more powerful engine of the 1911 tipo corsa; output was now 45 bhp (34 kW) at 2,400 rpm and top speed 105 km/h (65 mph).[1] The axle tracks were also widened front and rear—1.45 m (57 in) instead of the previous 1.35 m (53 in)
ALFA 20-30 HP
ALFA 20-30 HP | |
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Alfa Romeo 20-30 ES Sport |
The ALFA 20-30 HP of 1914 and 1915, or ALFA 24 HP series E, was an update of the earlier 24 HP. The in-block camshaft was now chain- instead of gear-driven, the engine produced 49 bhp (37 kW) at 2,400 rpm, and top speed was 115 km/h (71 mph).[1]
Although Italy initially remained neutral until 1915, with the outbreak of
During 1920 the 20-30 HP was developed into the larger displacement, shorter wheelbase Alfa Romeo 20-30 ES Sport, the first car to be badged Alfa Romeo from its introduction.[10] The 20-30 ES was produced in 1921 and 1922 in 124 examples.[11]
Production numbers
ALFA 24 HP and derivatives, production by year[12] Year 1910 1911 1912 1913 1914 1915 1916–19 1920 Model
totalSeries A B C D E World War I E 24 HP 10 40 50 103 97 — — — 300 20-30 HP — — — — — 100 185 95 380 Grand total 680
Specifications
The 24 HP and its derivatives were based on a
Its engine was a 4,084 cc or 249.2 cu in (bore and stroke 100 x 130 mm,
The driveline comprised a dry multi-plate
References
Notes
- ^ a b c d e f g h i Fusi (1978), p. 3.
- ^ "Technical specifications of 1910 Alfa 24 HP A". carfolio.com. Retrieved 4 January 2008.
- ^ "DARRACQ". targaflorio.info. Archived from the original on 14 June 2008. Retrieved 2008-07-22.
- ^ a b c d e Fusi (1978), p. 1–2.
- ^ Fusi (1978), p. 17–18.
- ^ Fusi (1978), p. 1.
- ^ a b "Targa Florio 1911—Classifica ragionata". targapedia.com (in Italian). Retrieved 12 August 2015.
- ^ Fusi (1978), p. 11.
- ^ Fusi (1978), p. 3, 11.
- ^ Fusi (1978), p. 44–45.
- ^ Fusi (1978), p. 44–46.
- ^ Fusi (1978), pp. 849–850.
Bibliography
- Borgeson, Griffith (1990). The Alfa Romeo Tradition. City: Haynes (Foulis) Publishing Group Ltd. Somerset, UK. ISBN 0-85429-875-4.
- Fusi, Luigi (1978). Alfa Romeo—Tutte le vetture dal 1910—All cars from 1910 (3rd ed.). Milan: Emmeti Grafica editrice.
External links
Media related to A.L.F.A 24 HP at Wikimedia Commons
- ALFA 24 HP page on the Museo Storico Alfa Romeo website