{{Infobox automobile | name = ALFA 40/60 HP | image = Car Musée Enzo Ferrari 0002.JPG | caption = 1921 ALFA 40/60 HP tipo corsa | manufacturer = [[Alfa Romeo|ALFA]] | aka = | production = 1913–1922<br />27 made{{sfnp|Fusi|1978|p=27}} | assembly = [[Portello (district of Milan)|Portello, Milan]], Italy | designer = | class = | body_style = {{unbulleted list|[[Torpedo (car)|Torpedo]]|Spider (''tipo corsa'')}} | layout = [[Front-engine, rear-wheel drive layout|Front-engine, rear-wheel drive]] | related = | platform = | engine = 6,082 cc [[Straight-four engine|I4]]{{sfnp|Fusi|1978|p=27}} | transmission = 4-speed [[Manual transmission|manual]]{{sfnp|Fusi|1978|p=27}} | wheelbase = {{convert|3200|mm|in|1|abbr=on}}{{sfnp|Fusi|1978|p=27}}<br />{{convert|2950|mm|in|1|abbr=on}}{{sfnp|Fusi|1978|p=27}} (''tipo corsa'') | length = | width = | height = | weight = {{convert|1250|kg|lb|0|abbr=on}}{{sfnp|Fusi|1978|p=27}}<br />{{convert|1100|kg|lb|0|abbr=on}}{{sfnp|Fusi|1978|p=27}} (''tipo corsa'') | predecessor = | successor = [[Alfa Romeo G1]] | sp = uk }}
[[File:1922-04-02 Targa Florio Alfa Romeo 40-60 HP Giuseppe Campari.jpg|thumbnail|left|[[Giuseppe Campari]] in his Alfa Romeo 40-60 HP at the 1922 [[Targa Florio]].]]
The '''ALFA 40/60 HP''' is a road car and race car made by [[Italy|Italian]] car manufacturer ALFA (later to become [[Alfa Romeo]]). This model was made between 1913 and 1922 and was designed by [[Giuseppe Merosi]], as were all other Alfas at that time. The 40/60 HP has a 6082 cc straight-four engine with overhead valves, which produced {{cvt|70|PS|kW|0}} and its top speed was {{convert|125|km/h|mph|abbr=on}}. The 40-60 HP Corsa racing version had {{cvt|73|PS|kW|0}} and a top speed of {{convert|137|km/h|mph|abbr=on}}, and it also won its own category in the Parma-Berceto race.
40/60 HP production and development was interrupted by the [[First World War]], but resumed briefly afterwards. The 40-60 HP Corsa now had {{cvt|82|PS|kW|0}} and a top speed of around {{convert|150|km/h|mph|abbr=on}}. [[Giuseppe Campari]] won the 1920 and 1921 races at [[Mugello Circuit|Mugello]] with this car.
==Specifications==
The 40-60 HP was based on a [[ladder chassis]] of C-shaped stamped steel rails.
Its engine was a {{convert|6082|cc|cuin|0|abbr=on|disp=or}} (bore and stroke 110 x 160 mm, [[compression ratio]] 4.35:1) [[overhead valve]] [[Straight-four engine|inline-four cylinder]], fed by a single vertical [[carburettor]].{{sfnp|Fusi|1978|p=3}} The ''[[Monobloc engine|en bloc]]'' [[cylinder block]] and [[cylinder head]] were split in two groups of two cylinders, and made of [[cast iron]]; the [[crankcase]] was cast [[aluminium]], incorporating the four engine mountings.{{sfnp|Fusi|1978|p=27}} The two in-block [[camshaft]]s were driven by a [[gear train]] located at the front of the engine.{{sfnp|Fusi|1978|p=27}}
The driveline comprised a dry multi-plate [[clutch]], a four-speed [[gearbox]] and a one-piece [[propeller shaft]], spinning inside a tube attached to the rear differential housing.{{sfnp|Fusi|1978|p=3}} At its open end, towards the gearbox, this tube forked out into two ends which, linked to the chassis, located the rear axle. The gearbox was positioned towards the middle of the chassis, almost underneath the driver, rather than in block with the engine—to which it was connected by a short prop shaft. Front and rear [[solid axle]]s were sprung on longitudinal semi-elliptic [[leaf spring]]s. Brakes were [[Drum brake|drums]] on the rear wheels, with both pedal and hand controls. The wheels were 5.5x19" [[Artillery wheel#Motor vehicles|Sankey-type pressed steel]].{{sfnp|Fusi|1978|p=27}}
===40-60 HP tipo corsa=== The ''tipo corsa'' sat on a shortened [[wheelbase]] of {{convert|2950|mm|in|1|abbr=on}}, instead of the road car's {{convert|3200|mm|in|1|abbr=on}}.{{sfnp|Fusi|1978|p=27}} [[Kerb weight]] was {{convert|1100|kg|lb|0|abbr=on}} versus {{convert|1250|kg|lb|0|abbr=on}}.{{sfnp|Fusi|1978|p=27}} The racing-prepared engine was fitted with two carburettors and had a 5.50:1 compression ratio.{{sfnp|Fusi|1978|p=27}} It produced {{cvt|73|PS|kW|0}} {{nowrap|at 2,000 rpm}}; after the war, for the 1920–22 races, it was brought to {{cvt|82|PS|kW|0}} {{nowrap|at 2,400 rpm}}.{{sfnp|Fusi|1978|p=27}} Top speed was {{convert|150|km/h|mph|0|abbr=on}}.{{sfnp|Fusi|1978|p=27}} The [[final drive]] ratio was 18/49 instead of the standard 17/49.{{sfnp|Fusi|1978|p=27}} The Sankey steel wheels were replaced by 6.0x20" knock-off [[wire wheel]]s.{{sfnp|Fusi|1978|p=27}} Fuel tank capacity was expanded from the standard {{convert|70|L|abbr=on}} to {{convert|120|L|abbr=on}}.{{sfnp|Fusi|1978|p=27}}
== <span class="anchor" id="Siluro Ricotti"></span><span class="anchor" id="Castagna"></span><span class="anchor" id="Aerodynamica"></span>40/60 HP Aerodynamica ==
[[File:Alfa 40-60 HP Aerodinamica.jpg|right|thumb|ALFA 40-60 HP [[Carrozzeria Castagna|Castagna]] Aerodinamica prototype]]
In 1914 the milanese count Marco Ricotti commissioned to [[Carrozzeria Castagna]] the ALFA 40/60 HP Aerodinamica (also known as {{lang|it|"Siluro Ricotti"}}), a prototype model which could reach {{convert|139|km/h|mph|abbr=on}} top speed. A replica of that car was created in the 1970s, and now it is shown in the [[Alfa Romeo Museum|Alfa Romeo Historical Museum]].<ref>{{cite web|title=Speciale Virtual Car: ALFA 40/60 HP Aerodinamico (carr. Castagna), 1914|url=http://www.virtualcar.it/speciale-virtual-car-alfa-romeo-40-60-hp-siluro-ricotti-1914/|work=virtualcar.it|access-date=11 October 2012|language=it|archive-url=https://web.archive.org/web/20130627212134/http://www.virtualcar.it/speciale-virtual-car-alfa-romeo-40-60-hp-siluro-ricotti-1914/|archive-date=2013-06-27|url-status=dead}}</ref>
{{Clear}} ==References==
===Notes=== {{reflist}}
===Bibliography=== {{refbegin}} * {{cite book |last=Borgeson |first=Griffith |title=The Alfa Romeo Tradition |publisher=Haynes (Foulis) Publishing Group Ltd. Somerset, UK |location=City |year=1990 |isbn=0-85429-875-4}} * {{cite book |first=Luigi |last=Fusi |title=Alfa Romeo—Tutte le vetture dal 1910—All cars from 1910 |year=1978 |publisher=Emmeti Grafica editrice |location=[[Milan]] |edition=3rd }} {{refend}}
==External links== {{Commons category}} * [http://autoconcept-reviews.com/cars_reviews/alfa-romeo/alfa-romeo-40-60-hp-castagna-siluro-aerodinamica-1914/cars_reviews_alfa_romeo-40-60-hp-castagna-siluro-aerodinamica-1914.html ALFA 40-60 HP Castagna Siluro Aerodinamica 1914 on autoconcept-reviews.com]
{{Alfa Romeo}} {{Alfa Romeo Pre War Timeline}}
[[Category:Alfa Romeo vehicles|40 60 HP]] [[Category:Cars introduced in 1913]] [[Category:1920s cars]] [[Category:Cars discontinued in 1922]]