{{More citations needed|date=April 2019}}{{Infobox automobile | image = Alfa Romeo 20-30 ES.jpg | caption = Alfa Romeo 20/30 HP ES | name = Alfa Romeo 20/30&nbsp;HP | manufacturer = [[Alfa Romeo]] | aka = | production = 1914 – 1922 | assembly = [[Portello (district of Milan)|Portello, Milan]], Italy | predecessor = | successor = | class = | body_style = [[Sedan (automobile)|Berlina]]<br>[[Torpedo (car)|Torpedo]] | layout = [[FR layout]] | platform = | engine = 4.1&nbsp;L [[straight-4|I4]] [[sidevalve]] 4084 cc<br>4.2&nbsp;L [[straight-4|I4]] [[sidevalve]] 4250 cc | transmission = | wheelbase = | length = | width = | height = | weight = | related = | designer = [[Giuseppe Merosi]] }}

'''ALFA''' or later '''Alfa Romeo''' has made three cars named as '''20/30&nbsp;HP''', first one 1910 4-cylinder 4-6-seater tourer, improved version '''20/30 HP E''' in 1914 and 1921 the '''20/30 HP ES Sport''', a 4-seater sportscar.<ref name="barchetta.cc">{{Cite web|url=http://www.barchetta.cc/All.Ferraris/events-stories/stories/alfa-romeo/alfa-romeo-index/index.html|title=All production, prototype & project Alfa Romeos from 1910 - 1971|access-date=2010-11-15|work=barchetta.cc| archive-url= https://web.archive.org/web/20101222195004/http://www.barchetta.cc/All.Ferraris/events-stories/stories/alfa-romeo/alfa-romeo-index/index.html| archive-date= 22 December 2010 | url-status= live}}</ref>

==The Alfa 20/30 HP== [[Image:1919 A.L.F.A. 24 HP (20-30 HP) Ramponi.jpg|thumb|left|[[Giulio Ramponi]] in an A.L.F.A 24 series E in 1920]] '''The Alfa Romeo "Torpedo" 20/30[[Tax horsepower|HP]]''' was the first car under the ALFA brand to formally carry the [[Alfa Romeo]] name. It was equipped with a 4250 cc sidevalve inline-four engine producing 67bhp. The car was intended for a launch amongst the upper classes of Italy, so the price was notably high- around three times that of the [[Ford Model T]], a large sum of money when one considers the post-[[World War I]] economy.

The ALFA 20/30 HP was almost identical to the [[ALFA 24 HP|24 HP]] of 1910 and was often simply called the HP 24 Serie E. The 24 HP's engine was reused completely, save for a sidechain on the camshaft to reduce noise. The maximum power was increased to 49bhp at 2400rpm, and the top speed increased to {{Convert|115|km/h|abbr=on}}. The vehicle was available in two body variants: A Berlina chassis and a [[Torpedo (car)|torpedo]] variant.

At the outbreak of World War I on August 3, 1914, Italy declared itself neutral. ALFA plants, as such, had not been directly affected by war, or by manufacturing related to the war effort. Production numbers between 1914 and 1915 totaled 285 finished 20/30 HP models. In 1915, the production totals decreased to 95 frames for the 20/30 HP, which were only completed in 1920.

==Alfa Romeo 20/30 ES Sport== [[File:Antonio Ascari in his Alfa Romeo 20-30 ES at the 1922 Targa Florio (2).jpg|thumb|Antonio Ascari in his Alfa Romeo 20-30 ES at the 1922 Targa Florio]] The ES Sport was based on the 1914 20/30 E model, the "S" being added to emphasize the sportiness of the car. Notably, the ES had [[electric light]]s and an electric [[Starter motor#Electric starter|starter]]. The [[chassis]] was shortened from previous models as well.

Price was a major negative factor, and only 124 were ever produced. Notably, it is with the ES that [[Enzo Ferrari]] began his racing career with teammates [[Antonio Ascari]] and [[Ugo Sivocci]].

* Engine: 4 cylinders inline * Displacement: 4250&nbsp;cc * Power: 67&nbsp;bhp at 2600&nbsp;rpm * Top speed: {{convert|130|km/h|mph|abbr=on}}

==Notes== {{Reflist}}

==References== {{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 }}

{{Alfa Romeo}} {{Alfa Romeo Pre War Timeline}}

{{DEFAULTSORT:Alfa Romeo 20 30 Hp}} [[Category:Alfa Romeo vehicles|20 30 HP]] [[Category:Cars introduced in 1914]] [[Category:1920s cars]]