{{Infobox automobile | image = 1921, an ALFA GP 40-60 HP Merosi+Baragiana.jpg | caption = Baragiana and [[Giuseppe Merosi]] in the 1921 version | name = ALFA 40/60 GP | aka = ALFA GP | manufacturer = [[Alfa Romeo|A.L.F.A.]] (1914)<br/> [[Alfa Romeo]] (1920-1921) | production = 1914 and 1920-1921 | assembly = [[Milan]], [[Italy]] | class = [[Racing car]] | body_style = 2-seater [[Open-wheel car|Open-wheeler]] | layout = [[Front-engine, rear-wheel-drive layout|FR Layout]] | engine = {{convert|4490|cc|cuin L|1|abbr=on}} [[Straight-4|straight four]] [[Overhead camshaft engine|Twin Overhead cam]] | transmission = 4-speed [[Chain drive]] [[Manual transmission|Manual]] | wheelbase = {{convert|2950|mm|in|1|abbr=on}} | length = {{convert|3200|mm|in|1|abbr=on}} | width = {{convert|1900|mm|in|1|abbr=on}} | height = {{convert|1633|mm|in|1|abbr=on}} | weight = {{convert|870|kg|lb|1|abbr=on}} | related = [[ALFA 40/60 HP]] | designer = [[Giuseppe Merosi]] | successor = [[ALFA 40/60 HP]] | capacity = 2-Door | powerout = {{convert|88-102|hp|PS kW|abbr=on}} @ 2,750-3,000 rpm <br /> {{convert|145-163|lbft|Nm|1|abbr=on}} @ 1,500-2,200 rpm }} '''ALFA 40/60 GP''' or '''GP''' (Grand Prix) was a fully working early racing car prototype made by the company now called [[Alfa Romeo]]. Only one example was built in 1914, which was later modified in 1921. This was the creation of [[Giuseppe Merosi]] and was the first Alfa Romeo [[DOHC]] engine. It had four valves per cylinder, 90 degree valve angle and twin spark ignition. Usually Alfa Romeo DOHC engines are thought to be [[Vittorio Jano]]'s creations but the first one was Merosi's GP car. This kind of engine architecture was very new for the time, originating from 1912/1913 [[Peugeot]] designed by Swiss engineer [[Ernest Henry (engineer)|Ernest Henry]]. The history of this engine architecture is unclear, but other cars with dual overhead camshafts were made by [[Sunbeam Motor Car Company|Sunbeam]], [[Delage]] and [[Humber (car)|Humber]]. This 1914 GP car was intended to take part in the [[French Grand Prix]] of that year, but for reasons unknown this never happened. In 1921 [[Giuseppe Campari]] took part in the Gentlemen G.P. in [[Brescia]] with the modified GP car, but was forced to retire due to a leaking radiator.<ref name="alfaromeo.com.au">{{Cite web |url=http://www.alfaromeo.com.au/default.asp?action=article&ID=17503 |title=The Grand Prix from 1914 |access-date=2007-04-26 |work=alfaromeo.com.au |archive-url=https://web.archive.org/web/20070219155610/http://www.alfaromeo.com.au/default.asp?action=article&ID=17503 |archive-date=2007-02-19 |url-status=dead }}</ref>
The GP engine had a displacement of 4.5 litres (4490 cc) and produced {{convert|88|bhp|kW|0|abbr=on}} at 2950 rpm and after modifications in 1921 {{convert|102|bhp|kW|0|abbr=on}} at 3000 rpm. The top speed of this car was {{convert|88|-|93|mph|km/h|abbr=on}}. It was not until the 1920s when these [[DOHC]] engines came to Alfa road cars like the [[Alfa Romeo 6C]].
== Notes == {{reflist}}
== References == *[http://www.velocetoday.com/cars/cars_75.php VeloceToday.com] Retrieved on 2007-04-26. *{{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}}
[[Category:Alfa Romeo racing cars|40 60 GP]] [[Category:Grand Prix cars]] [[Category:Cars introduced in 1914]] [[Category:Cars discontinued in 1921]]