{{For|current Alfa Romeo V6 engine|Alfa Romeo 690T engine}} {{Infobox automobile engine | image= 20061105 Alfa Romeo 166 3-11 v6.jpg | caption=Alfa Romeo 3.0 V6 24V | name=Alfa Romeo V6 engine |designer=[[Giuseppe Busso]] | aka =Alfa Romeo V6 Busso | manufacturer=[[Alfa Romeo]] (1979–1986)<br/>Alfa [[Lancia]] Industriale (1987–1991)<br/>[[FCA Italy|Fiat Auto]] (1991–2005) | configuration=60° [[V6 engine|V6]] | production=1979–2005 | predecessor = Alfa Romeo straight-6 | successor=[[JTS engine]] | bore ={{ubl |{{cvt|80|mm|2}}|{{cvt|88|mm|2}}|{{cvt|93|mm|2}} }} | stroke ={{ubl |{{cvt|66.2|mm}}|{{cvt|68.3|mm}}|{{cvt|72|mm|2}}|{{cvt|72.6|mm}}|{{cvt|78|mm|2}} }} | displacement ={{ubl |{{cvt|1996|cc|L cc CID|1|order=out}}|{{cvt|2492|cc|L cc CID|1|order=out}}|{{cvt|2784|cc|L cc CID|1|order=out}}|{{cvt|2934|cc|L cc CID|1|order=out}}|{{cvt|2959|cc|L cc CID|1|order=out}}|{{cvt|3179|cc|L cc CID|1|order=out}} }} | length = | diameter = | width = | height = |turbocharger = [[Mitsubishi Motors|Mitsubishi]] TD 05H (164)<ref name="carfolio.com/">{{Cite web|url=http://www.carfolio.com/specifications/models/car/?car=40667|title=1991 Alfa Romeo 164 V6 Turbo|accessdate=2009-06-25|website=carfolio.com/}}</ref><br />[[Garrett AiResearch|Garrett]] T25 (GTV, 166)<ref name="http://www.carfolio">{{Cite web|url=http://www.carfolio.com/specifications/models/car/?car=40689|title=1997 Alfa Romeo GTV 2.0 Turbo|accessdate=2009-06-25|website=www.carfolio}}</ref><ref name="www.carfolio.com">{{Cite web|url=http://www.carfolio.com/specifications/models/car/?car=31933|title=1998 Alfa Romeo 166 2.0 V6 Turbo|accessdate=2009-06-25|website=carfolio.com}}</ref> | weight =2.5 V6 {{cvt|135|kg|lb}} (without ancillaries)<ref>EPER (version 5.8.0) parts catalogue</ref><br />{{cvt|375|lb|kg}} Alfa Romeo SOHC V6<ref>Complete Handbook of Automotive Power Trains, Jan Norbye, 1981</ref> | block = Aluminium | head = Aluminium | valvetrain =[[SOHC]]/[[DOHC]] 60° 2/[[Multi-valve#Four valves|4 valves]] x cylinder, respectively | supercharger = | fuelsystem =6 [[Dell'Orto]] [[carburetor]]s<br />[[Fuel injection]] | management=[[Robert Bosch GmbH|Bosch]] [[Jetronic#L-Jetronic .281974.E2.80.931989.29|L-Jetronic]] and [[Motronic]] | fueltype = [[Petrol]] | oilsystem = [[Wet sump]] | coolingsystem =[[Water cooling (engines)|Water-cooled]] | power = {{cvt|97|–|184|kW|PS|0}} | torque = {{cvt|178|–|300|Nm|lbft|0}} | compression = 8.0:1 – 10.5:1 | fuelcon = | specpower = {{cvt|66.1|PS|kW hp|1}}/L–{{cvt|78.6|PS|kW hp|1}}/L n/a <br />{{cvt|105.2|PS|kW hp|1}}/L turbo | specfuelcon = | oilcon = }} [[File:Alfaromeo166turbo.jpg|thumb|2.0L V6 12V Turbo from [[Alfa Romeo 166]] ]]
The '''Alfa Romeo V6 engine''' (also called the '''Busso V6''') is a 60° [[V6 engine]] made by [[Alfa Romeo]] from 1979 to 2005. It was developed in the early 1970s by [[Giuseppe Busso]], and first used on the [[Alfa Romeo Alfa 6|Alfa 6]] with a [[Engine displacement|displacement]] of {{cvt|2492|cc|L|1|order=flip}} and a [[SOHC]] 12-valve [[cylinder head]]. Later versions ranged from {{cvt|1996|to|3179|cc|L}} and had [[DOHC]] 24-valve [[valvetrain]]s. The original design had short [[pushrod]]s for the [[exhaust valve]]s in a design similar to earlier [[Lancia]] [[Lancia V4 engine#Fulvia|Fulvia engines]]. The first DOHC version was in the 1993 [[Alfa Romeo 164]], with an [[aluminium alloy]] [[engine block]] and head with [[sodium]] filled exhaust valves.
The Alfa Romeo V6 has been used in kit cars like the [[Ultima GTR]], Hawk HF Series, and [[Dax Cars|DAX]],<ref name="Ultima">{{Cite web|url=http://www.iol.co.za/motoring/last-run-wins-king-of-the-mountain-1.860034|title=Last run wins King of the Mountain|accessdate=2012-06-10|year=2006|website=iol.co.za}}</ref><ref name="hawkcars.co.uk">{{Cite web|url=http://www.hawkcars.co.uk/hf3000/index.html|title=Hawk HF2000/HF3000 Series|accessdate=2009-04-05|website=hawkcars.co.uk}}</ref><ref name="daxbenelux.com">{{Cite web|url=http://www.daxbenelux.com/rushtech.htm|title=DAX Rush Specifications|accessdate=2009-04-05|website=daxbenelux.com|archiveurl=https://web.archive.org/web/20090227100408/http://www.daxbenelux.com/rushtech.htm|archivedate=2009-02-27|url-status=dead}}</ref> as well as the [[Gillet|Gillet Vertigo]] sports car <ref name="autoblog.com">{{Cite web|url=http://www.autoblog.com/2007/04/13/gillett-vertigo-streiff-a-body-to-match-its-alfa-romeo-heart/|title=Gillett Vertigo Streiff: A body to match its Alfa Romeo heart|accessdate=2009-04-05|website=autoblog.com |date=13 April 2007 }}</ref> and the Lancia Aurelia B20GT Outlaw.<ref name=":0">{{cite web|title=LANCIA AURELIA B20GT OUTLAW|website=thornleykelham.com|url=https://www.thornleykelham.com/wp-content/uploads/2022/03/The-final-3-Outlaws.pdf|access-date=5 September 2024}}</ref> In August 2011 [[Evo (magazine)|EVO magazine]] wrote that "the original Alfa Romeo V6 was the most glorious-sounding six-cylinder road engine ever,"<ref>EVO Magazine August 2011 page 77</ref> and has been called the "Violin of Arese" or "Alfa's Violin".<ref>{{Cite web |last=Licata |first=Matteo |date=2021-03-24 |title=The Story Of Alfa's Violin |url=https://medium.com/roadster-life/the-story-of-alfas-violin-db1796bb5a64 |access-date=2022-12-05 |website=Roadster Life |language=en}}</ref> The Alfa Romeo V6 engine has also been used in [[ice resurfacer]] made by engo Ltd. in Italy.<ref name="iceprofi.com">ICE PROFI: [http://www.iceprofi.com/ice-resurfacers/engo-270-sx/ Engo 270 SX | ICE PROFI], accessdate: 26. October 2019</ref>
==12V, two valve==
===2.0=== A {{cvt|1996|cc|L CID|1|order=flip}} version was introduced in 1983. Both [[carburettor|carburetted]] {{cvt|136|PS|kW hp|0|lk=on}} and fuel-injected {{cvt|132|PS|kW hp|0}} versions were available from the start.<ref name="elaborare.com">ELABORARE: [https://www.elaborare.com/83943-motore-alfa-romeo-v6-tuning-auto-storiche/ Motore Alfa Romeo V6 — ELABORARE], accessdate: 14. September 2018</ref>
Applications: * 1983–1986 [[Alfa Romeo Alfa 6]] * 1984–1987 [[Alfa Romeo 90]]
===2.0 Turbo=== A {{cvt|1996|cc|L CID|1|order=flip}} [[turbocharged]] version, derived from the 3.0 L 12v, first with total digital management, was introduced in 1991 in the Alfa Romeo 164 with {{cvt|210|PS|kW hp|0}}.<ref name="boitierrouge.com">Boitier Rouge: [http://boitierrouge.com/2014/05/25/alfa-romeo-164-la-meilleure-des-tipo-4/ Alfa Romeo 164 : la meilleure des « Tipo 4 » ? | Boitier Rouge], accessdate: 14. September 2018</ref> The engine has a bore and stroke of {{cvt|80x66.2|mm|in|2}}. It was mainly intended for domestic market, due to Italian law at the time taxing cars with engines with larger displacement than two liters at a higher rate.
Applications: * 1991–1992 [[Alfa Romeo 164]] * 1992–1997 [[Alfa Romeo 164|Alfa Romeo 164 Super]] * 1994–2000 [[Alfa Romeo GTV and Spider|Alfa Romeo GTV]] * 1998–2000 [[Alfa Romeo GTV and Spider|Alfa Romeo Spider]] * 1996–2000 [[Alfa Romeo 166]] Super
===2.5=== [[File:Alfa Romeo GTV6 engine bay.jpg|thumb|[[Longitudinal engine|Longitudinal]] 2.5L in a GTV6 ]] The original engine displaced {{cvt|2492|cc|L CID|1|order=flip}} and produced {{cvt|158|PS|kW hp|0}}.<ref name="elaborare.com"/> It was a 2-valve-per-cylinder design with a single belt-driven [[camshaft]] per [[cylinder bank]] and six carburettors. The engine has a bore and stroke of {{cvt|88x68.3|mm|in}}.
The [[Robert Bosch GmbH|Bosch]] [[L-Jetronic]] [[fuel injection]] was added for the 1983 Alfa 6, which produced the same {{cvt|158|PS|kW hp|0}}.<ref name="elaborare.com"/> The 2-valve engine ended its life in the [[Alfa Romeo 155|Alfa 155]], where there were two series for this engine, the {{cvt|2492|cc|L CID|1|order=flip}} developing {{cvt|166|PS|kW hp|0}}.{{citation needed|date=October 2018}} Differences between them were small and only on [[torque]] and power delivery producing exactly the same horsepower.
Applications: * 1979–1986 [[Alfa Romeo Alfa 6]] * 1980–1986 [[Alfa Romeo GTV6]] (Alfa Romeo Alfetta GTV6 2.5) * 1984–1987 [[Alfa Romeo 90]] * 1985–1991 [[Alfa Romeo 75|Alfa Romeo 75/Milano]] * 1992–1997 [[Alfa Romeo 155]] * 1993–1996 [[Fiat Croma]] * 1987–1989 [[Laforza|Rayton Fissore Magnum]] V6<ref name="4rouesmotrices.com">{{Cite web|url=http://www.4rouesmotrices.com/index.php?rub=1&show=3637&pr=Rayton%20Fissore|title=Rayton Fissore Magnum V6 (1987–1989)|accessdate=2010-05-09|website=4rouesmotrices.com|language=fr}}</ref> *1982 [[AC 3000ME]] MkII Prototype<ref name="petrolicious.com">This AC 3000 ME MkII Prototype Is The British Lancia Stratos You Never Knew You Wanted • Petrolicious: [https://petrolicious.com/articles/this-ac-3000-me-mkii-prototype-is-the-british-lancia-stratos-you-never-knew-you-wanted This AC 3000 ME MkII Prototype Is The British Lancia Stratos You Never Knew You Wanted • Petrolicious], accessdate: 26. January 2020</ref>
===2.8 Gleich=== In 1982, the German Alfa Romeo dealer and tuner Gleich offered a 2.8 conversion of the GTV6 2.5 engine. Dieter Gleich was sure that engine displacement enlargement is still the best and, for the life of the engine, the healthiest way of [[Car tuning|tuning]]. The engine capacity was increased to nearly 2.8 liters by using new bushings and custom-built forged [[Mahle GmbH|Mahle]] pistons while the [[compression ratio]] was raised from 9.5 to 10.5:1. The 2.5 liter was rebored to {{cvt|93|mm|in|2}}. Total displacement was {{cvt|2783.7|cc|L|1}}. Power produced were {{cvt|191|PS|kW hp|0}} at 6,300 rpm and torque {{cvt|24.6|kgm|0}} at 4200 rpm.<ref name="classiccarsmagazine.nl">Classic Cars: [https://www.classiccarsmagazine.nl/model/alfa-romeo-gtv6-2-8/ Alfa Romeo GTV6 2.8 specificaties en info — Classic Cars], accessdate: 14. September 2018</ref>
The magazine "Sport driver" tested a 2.8 Gleich powered GTV6 in June 1982: <blockquote>"After engaging the first gear and a somewhat careless step on the gas pedal you get a touched feel to the epiphany GTV6 shot, accompanied by the typical Alfa Romeo exhaust sound. It was a pleasure. The fact was the sprint from 0 to {{cvt|100|km/h|mi/h|0}} is not further under the seven-second limited by a tricky-to-be-shifted five-speed gearbox. The really vehement propulsion waned only when the speedometer {{cvt|230|km/h|mi/h|0}} mark has left behind. Another eye-opening experience awaits when you realize that the lightning speed to 7000 rpm rotating in any gear pinion even in fifth gear still from 1500 rpm is completely smooth."</blockquote>
Applications: * 1982 Alfa Romeo Alfetta GTV6 2.8 Gleich
===3.0 SA (Autodelta)=== The original 2.5 engine as used in the Alfa 6 was bored and stroked by [[Autodelta]], the former Alfa Romeo racing department to match the racing rules for South African and Australian championships. Bore was increased from {{cvt|88|mm|in|2}} to {{cvt|93|mm|in|2}} and a new [[crankshaft]] stroked to {{cvt|72|mm|in|2}}. The total displacement was {{cvt|2934.5|cc|L|1}} and it's a totally different engine from the later {{cvt|2959|cc|L|1}} that powered the [[Alfa Romeo 75|75/Milano]] models. It was, too, a 2-valve-per-cylinder design with a single belt-driven camshaft per cylinder bank and six carburettors. Special camshafts and carbs were used giving a power figure of {{cvt|176.4|PS|kW hp|0}}{{citation needed|date=October 2018}} at 5800 rpm. Torque was {{cvt|222|Nm|lb·ft|0}}{{citation needed|date=October 2018}} at 4300 rpm, while compression ratio was 9:1.
Only 174 complete GTV6 3.0 SA cars were produced in 1984, plus 68 more in 1985. The last ones built were fitted with [[Fuel injection#Multi-point injection|electronic fuel injection]].
The 3.0 GTV6 was sold in South Africa in 1983–1985, predating the release of the 3.0 L displacement to the rest of the world.<ref name="carmag.co.za">CAR magazine: [http://www.carmag.co.za/buying-used-cars/classic-buy-alfa-romeo-gtv6-1982-1985/ CLASSIC BUY: Alfa Romeo GTV6 (1982–1985) — CAR magazine], accessdate: 14. September 2018</ref> This engine was an Autodelta hand made conversion based on Alfa Sei 2.5 carbureted engines enlarged to [[Bore (engine)|bore]] and [[Stroke (engine)|stroke]] of {{cvt|93|×|72|mm}}.<ref name="carmag.co.za"/><ref name="topcar.co.za">topCar magazine online: [http://www.topcar.co.za/classic-cars/articles/alfa-30-gtv6?page=2 Alfa 3.0 GTV6 | topCar magazine online], accessdate: 14. September 2018</ref>
Applications: * 1984–1985 [[Alfa Romeo Alfetta#GTV 2.0 and GTV6|Alfa Romeo Alfetta GTV6 3.0 SA]]
===3.0=== Pulled by the racing success of the 3.0 SA engine and looking for more power to boost [[Alfa Romeo 75|75/Milano]] sales in countries like USA, Alfa Romeo introduced a production version of the 3.0 engine. Bore was {{cvt|93|mm|in|2}}, as the 3.0 SA, but stroke was increased to {{cvt|72.6|mm|in|2}}. The total displacement was {{cvt|2959|cc|L|1}}. As the previous engines, it was a 2-valve-per-cylinder design with a single belt-driven camshaft per cylinder bank. The main difference with the racing 3.0 SA was the use of modern [[L-Jetronic]] fuel injection system by [[Robert Bosch GmbH|Bosch]]. Power figures vary from {{cvt|188|PS|kW hp|0}} to {{cvt|192|PS|kW hp|0}} at 5800 rpm,{{citation needed|date=October 2018}} with compression ratio 9:1.
This engine was modified for [[transverse engine|transverse]] placement in the 164 and fitted with a high-performance camshaft and low-restriction exhaust, producing {{cvt|192|PS|kW hp|0}} in standard form, {{cvt|184|PS|kW hp|0}} when a [[Catalytic converter|catalyzer]] was added in 1991, with the Cloverleaf version producing {{cvt|200|PS|kW hp|0}}.{{citation needed|date=October 2018}}
The same engine was fitted to the [[Alfa Romeo SZ|SZ and RZ — ES30 Zagato]], but even more finely tuned with wilder cams and high compression pistons to a further {{cvt|210|PS|kW hp|0}}.<ref name="fast-classics.com">Fast Classics: [http://www.fast-classics.com/cars/alfa-romeo-s-z-2-for-sale/ Alfa Romeo S.Z. | Fast Classics], accessdate: 26. October 2019</ref>
Applications: * 1987–1991 [[Alfa Romeo 75|Alfa Romeo 75/Milano]] * 1988–1997 [[Alfa Romeo 164]] * 1989–1991 [[Alfa Romeo SZ]] * 1992–1994 [[Alfa Romeo RZ]] * 1992–1994 [[Lancia Thema]] * 1993–2000 [[Alfa Romeo GTV & Spider|Alfa Romeo Spider]] * 1994 [[Alfa Romeo GTV & Spider|Alfa Romeo GTV]]
==24V, four valve==
===2.5 24V=== [[File:AlfaRomeo25V6.JPG|thumb|24V 2.5L from an [[Alfa Romeo 156]] ]]
A four-valve version was introduced in 1997 with the Alfa Romeo 156. The engine now produced {{cvt|190|PS|kW hp|0}}.<ref name="alfisti.ru">{{Cite web|url=http://www.alfisti.ru/156/technica.htm#25|title=Technical Specifications 156|accessdate=2008-01-28|website=alfisti.ru| archiveurl= https://web.archive.org/web/20080310184001/http://www.alfisti.ru/156/technica.htm| archivedate= 10 March 2008 | url-status= live}}</ref> In 2001, the V6 was uprated to {{cvt|192|PS|kW hp|0}}.<ref name="alfaromeopress.com">Fiat Chrysler Automobiles EMEA Press: [https://web.archive.org/web/20180624232800/http://www.alfaromeopress.com/press/article/new-alfa-156-and-alfa-156-gta New Alfa 156 and Alfa 156 GTA — Press Releases — Fiat Chrysler Automobiles EMEA Press], accessdate: 14. September 2018</ref> The 166 used a slightly detuned version to make more low rev torque. This engine version was awarded as the [[International Engine of the Year]] in 2000.<ref name="alfisti.ru"/> The engine has a bore and stroke of {{cvt|88x68.3|mm|in}}, the same as the two-valve.
Applications: * 1996<ref name="bozhdynsky.com">{{cite web|url=http://www.bozhdynsky.com/alfa-147-156-166-gt-production-dates/|title=Alfa 147 156 166 GT Production Dates|accessdate=2 December 2015|work=bozhdynsky.com}}</ref>–2005 [[Alfa Romeo 156]] * 1996<ref name="bozhdynsky.com" />–2007 [[Alfa Romeo 166]]
===3.0 24V=== [[File:Alfa164 DOHC24V Engine.jpg|thumb|[[Alfa Romeo 164]] 24V 3.0L ]] [[File:AlfaRomeo30-24V.JPG|thumb|3.0L V6 24V, newer version with red lettering]] [[File:Lancia kappa coupe 3,0.jpg|thumb|Lancia Kappa 3.0L 24V had black intake runners]] The engine was upgraded to dual overhead cams and four valves per cylinder in 1993. Due to this and other refinements, this engine produced {{cvt|211|PS|kW hp|0}} for the regular 1993 Alfa Romeo 164, with {{cvt|230|PS|kW hp|0}} and {{cvt|276|Nm|0}} in the 164 QV with its engine producing {{cvt|232|PS|kW hp|0}} on the Q4 model which in its final production run in 1996, it got reduced to {{cvt|228|PS|kW hp|0}} but with increased torque.<ref name="quattroruote.it">Quattroruote.it: [https://www.quattroruote.it/tutte-le-auto/alfa-romeo/164 Listino ALFA ROMEO 164 (1987–1998) — prezzi, caratteristiche tecniche e accessori — Quattroruote.it], accessdate: 14. September 2018</ref> The final run of 3.0 V6 engines in the GTV, Spider and [[Alfa Romeo 166|166]] range, produced {{cvt|218–220|PS|kW hp|0}}<ref name="quattroruote.it"/> in the [[Euro 3]]-compliant version. The engine has a bore and stroke of {{cvt|93x72.6|mm|in|2}}, the same as the two-valve.
Applications: * 1991 [[Alfa Romeo Proteo]] concept car * 1993–1997 [[Alfa Romeo 164]] * 1994–2000 [[Lancia Kappa]] * 1996–2003 [[Alfa Romeo GTV and Spider|Alfa Romeo GTV]] * 2000–2003 [[Alfa Romeo GTV and Spider|Alfa Romeo Spider]] * 1996–2007 [[Alfa Romeo 166]] * 2001–2008 [[Lancia Thesis]] * 1998–present [[Gillet|Gillet Vertigo]] (Vertigo also used a 3.6 L and 3.9 L version)
===3.2 24V=== [[File:GTAengine32.jpg|thumb|[[Alfa Romeo 147]] GTA 3.2L ]] In 2002 Alfa Romeo introduced the 156 and 147 GTA with a {{cvt|3179|cc|L CID|1|order=flip}} version of the V6 with {{cvt|250|PS|kW hp|0}} and {{cvt|300|Nm|0}} of torque.<ref name="alfaromeopress.com"/> Later this engine was also used in the Alfa Romeo 166, GTV, Spider and Alfa Romeo GT<ref>{{cite web|url=https://www.carfolio.com/specifications/models/car/?car=115533|website=carfolio.com|title=2003 Alfa Romeo GT 3.2 V6 |date=February 28, 2013|accessdate=July 27, 2018}}</ref> in a slightly detuned form {{cvt|240|PS|kW hp|0}}.<ref name="caradisiac.com">Fiche technique Alfa Romeo 166 3.2 V6 240 BLACK LINE 2007: [https://www.caradisiac.com/fiches-techniques/modele--alfa-romeo-166/2007/3.2+v6+240+black+line/ Fiche technique Alfa Romeo 166 3.2 V6 240 BLACK LINE 2007], accessdate: 14. September 2018</ref> The engine has a bore and stroke {{cvt|93x78|mm|2}}.<ref name="www.italiaspeed.com">{{Cite web|url=http://www.italiaspeed.com/newmodels_147gta_01.html|title=Alfa Romeo 147 GTA|accessdate=2008-01-28|website=www.italiaspeed.com}}</ref> In Lancia this engine produced {{cvt|230|PS|kW hp|0}}.<ref name="lanciapress.com">Fiat Chrysler Automobiles EMEA Press: [http://www.lanciapress.com/press/article/new-engines-for-the-lancia-thesis NEW ENGINES FOR THE LANCIA THESIS — Press Releases — Fiat Chrysler Automobiles EMEA Press] {{Webarchive|url=https://web.archive.org/web/20181015002949/http://www.lanciapress.com/press/article/new-engines-for-the-lancia-thesis |date=2018-10-15 }}, accessdate: 14. September 2018</ref>
Applications: * 2002–2005 [[Alfa Romeo 156|Alfa Romeo 156 GTA]] * 2002–2005 [[Alfa Romeo 147|Alfa Romeo 147 GTA]] * 2002–2004 [[Alfa Romeo GTV and Spider|Alfa Romeo GTV]] * 2002–2004 [[Alfa Romeo GTV and Spider|Alfa Romeo Spider]] * 2003–2007 [[Alfa Romeo 166]] * 2003–2010 [[Alfa Romeo GT]] * 2003–2009 [[Lancia Thesis]]
===3.5 24V=== In December 2002, at the Bologna Motor Show,<ref name=":0" /> Alfa Romeo displayed a 156 GTAm prototype, built by N-Technology, with 3458cc. The power was increased to 300 PS at 6,800rpm. The engine had a bore and stroke of 97 mm x 78 mm. This version never came to production, and it was based on N-Technology's experience racing the 156 GTA SuperTuring.
Application:
* 2002 Alfa Romeo 156 GTAm [[N.Technology]]
==== 2.5 DTM ==== Alfa Romeo raced, in early 1990s, a 2.5-litre engine based on Busso's 60º V6. The engine was substantially revised and had a difference bore and stroke from the 2.5 standard engine, respectively, 93 mm x 61.3 mm, and making 420 bhp (313 kW) at 11,800 rpm with a torque of 294 Nm. Alfa Romeo, during the 1993–1996 era of DTM/ITC, racked up an incredible thirty-eight victories of a total of eighty-nine starts. The V6-engined machine also qualified on pole nineteen times and set the fastest lap in forty-two races.
Application:
* [[Alfa Romeo 155#155 V6 TI|Alfa Romeo 155 V6 TI]].<ref>{{Cite web |title=1996 Alfa Romeo 155 V6 TI ITC | Milan |url=https://rmsothebys.com/en/auctions/mi21/milan/lots/r0014-1996-alfa-romeo-155-v6-ti-itc/1097324 |website=RM Sotheby's}}</ref><ref>{{Cite book |last=Collins |first=Peter |url=https://books.google.com/books?id=bpxID9TWDS8C&dq=alfa+romeo+690rc+engine&pg=PA92 |title=Alfa Romeo 155/156/147 Competition Touring Cars: The Development and Racing History |date=September 3, 2012 |publisher=Veloce Publishing Ltd |isbn=9781845843427 |via=Google Books}}</ref><ref>{{Cite web |last=D |first=Nick |date=April 1, 2016 |title=1996 Alfa Romeo 155 V6 TI | Alfa Romeo |url=https://www.supercars.net/blog/1996-alfa-romeo-155-v6-ti/}}</ref><ref>{{cite web |date=30 September 2020 |title=Alfa Romeo 155 V6 TI DTM |url=https://www.collierautomedia.com/alfa-romeo-155-v6-ti-dtm |access-date=9 December 2022}}</ref><ref>{{Cite web |title=Alfa Romeo 155 2.5 V6 TI |url=https://www.fcaheritage.com/en-uk/heritage/stories/alfa-romeo-155v6 |access-date=2022-11-23 |website=www.fcaheritage.com |language=en-GB}}</ref>
Later, Alfa Romeo also raced a development of the [[V6 PRV engine|Peugeot, Renault, Volvo 90° V6 engine]], with 490 PS at 11,900 rpm, in the 1996 DTM Championship.<ref name="youtube.com" >YouTube: [https://www.youtube.com/watch?v=DRcFpmQL3bc Limone Racconta: La verità sul motore Alfa 155 V6 Ti + 156 e Fulvia Concept — Davide Cironi (SUBS) — YouTube], accessdate: 26 July 2018</ref>
===Other 24V displacements===
Alfa Romeo worked on other displacements, specifically a 2.8L (2846cc), with 88 mm bore (same as the 2.5 liter engine) and a 78 mm stroke (same as the 3.2 liter engine). According to Alfa Romeo engineers, there were considerable gains, especially in torque. However, this engine never made it into series production. Some private workshops work on these engines to obtain larger displacements (and power outputs), with diameters of 101 mm (3.75L) or even 103 mm (3.9L).
== Engine applications — Table == {| class="wikitable" | rowspan="5" |'''Layout''' | rowspan="5" |'''Engine''' |'''Cylinder Head''' | colspan="6" |'''12 valves''' | colspan="3" |'''24 valves''' |- |Version |2.0 |2.0 Turbo |2.5 |2.8 Gleich |3.0 Autodelta |3.0 |2.5 |3.0 |3.2 |- |Bore | colspan="2" |80 |88 |93 |93 |93 |88 |93 |93 |- |Stroke | colspan="2" |66,2 |68.3 |68.3 |72.0 |72.6 |68.3 |72.6 |78.0 |- |Capacity | colspan="2" |1 996 |2 492 |2 784 |2 934 |2 959 |2 492 |2 959 |3 179 |- | rowspan="6" |'''Longitudinal''' | colspan="2" |Alfa Romeo Alfa 6 |1983–1986 | |1979–1986 | | | | | | |- | colspan="2" |Alfa Romeo GTV6 (Alfetta) | | |1980–1986 |1982 |1984–1985 | | | | |- | colspan="2" |Alfa Romeo 90 |1984–1987 | |1984–1987 | | | | | | |- | colspan="2" |Alfa Romeo 75/Milano | | |1985–1991 | | |1987–1991 | | | |- | colspan="2" |Alfa Romeo SZ | | | | | |1989–1991 | | | |- | colspan="2" |Alfa Romeo RZ | | | | | |1992–1994 | | | |- | rowspan="13" |'''Transverse''' | colspan="2" |Alfa Romeo 164 | |1991–1997 | | | |1988–1997 | |1993–1997 | |- | colspan="2" |Alfa Romeo 155 | | |1992–1997 | | | | | | |- | colspan="2" |Alfa Romeo GTV (916) | |1994–2000 | | | |1994 | |1996–2003 |2002–2004 |- | colspan="2" |Alfa Romeo Spider (916) | |1998–2000 | | | |1993–2000 | |2000–2003 |2002–2004 |- | colspan="2" |Alfa Romeo 156 | | | | | | |1996–2005 | | |- | colspan="2" |Alfa Romeo 166 | |1996–2000 | | | | |1996–2007 |1996–2007 |2003–2007 |- | colspan="2" |Alfa Romeo 156 GTA | | | | | | | | |2002–2005 |- | colspan="2" |Alfa Romeo 147 GTA | | | | | | | | |2002–2005 |- | colspan="2" |Alfa Romeo GT | | | | | | | | |2003–2010 |- | colspan="2" |Fiat Croma | | |1993–1996 | | | | | | |- | colspan="2" |Lancia Thema | | | | | |1992–1994 | | | |- | colspan="2" |Lancia Kappa | | | | | | | |1994–2000 | |- | colspan="2" |Lancia Thesis | | | | | | | |2001–2008 |2003–2009 |}
== Production end == The V6 production ended in 2005 at [[Alfa Romeo Arese Plant]];<ref name="italiaspeed.com">{{Cite web|url=http://www.italiaspeed.com/2005/cars/alfa_romeo/02/arese/2302.html|title=News 25.02.2005|accessdate=2008-01-07|website=italiaspeed.com}}</ref> a stock of five thousand were built, to be used in Lancia Thesis, Alfa 166 and Alfa GT models.<ref name="www2.rdbcub.it">{{Cite web|url=http://www2.rdbcub.it/rassegna_stampa01100605.htm|title=Ad Arese in via di smantellamento la linea di produzione del "6 cilindri"|accessdate=2009-05-01|website=www2.rdbcub.it|language=it|archive-url=https://web.archive.org/web/20120222232454/http://www2.rdbcub.it/rassegna_stampa01100605.htm|archive-date=2012-02-22|url-status=dead}}</ref> The engine was replaced in the [[Alfa Romeo 159|159]] and [[Alfa Romeo Brera|Brera]] by a new 3.2 L V6 unit combining a General Motors-designed engine block with Alfa Romeo cylinder heads and induction. British [[automotive engineering]] company [[Cosworth]] was keen to buy assembly lines of the Alfa Romeo V6 engine, but the Italian company did not want to sell it.<ref name="archivio.lastampa.it">{{Cite web|url=http://archivio.lastampa.it/LaStampaArchivio/main/History/tmpl_viewObj.jsp?objid=6190029|title=LA COSWORTH AD ARESE|accessdate=2009-05-01|website=archivio.lastampa.it|language=it|archive-url=https://web.archive.org/web/20110722041324/http://archivio.lastampa.it/LaStampaArchivio/main/History/tmpl_viewObj.jsp?objid=6190029|archive-date=2011-07-22|url-status=dead}}</ref> The last version of 3.2 L engine was [[Euro4]] compliant, so it would have been possible to produce it a couple of years more.<ref name="alfaromeo.co.nz">{{Cite web|url=http://www.alfaromeo.co.nz/New-Vehicles/Archived-Models/Alfa-147-GTA/Engine--Gearbox/default.aspx|title=Alfa 147 GTA|accessdate=2009-05-01|website=alfaromeo.co.nz|archive-url=https://web.archive.org/web/20100525061702/http://www.alfaromeo.co.nz/New-Vehicles/Archived-Models/Alfa-147-GTA/Engine--Gearbox/default.aspx|archive-date=2010-05-25|url-status=dead}}</ref> The engine's designer Giuseppe Busso died within a couple of days after the last engine was produced in Arese.<ref name="autoedizione.com">AutoEdizione.com: [https://www.autoedizione.com/alfisti-commemorate-giuseppe-busso-in-arese/ Alfisti commemorate Giuseppe Busso in Arese | AutoEdizione.com] {{Webarchive|url=https://web.archive.org/web/20181015003041/https://www.autoedizione.com/alfisti-commemorate-giuseppe-busso-in-arese/ |date=2018-10-15 }}, accessdate: 14. September 2018</ref>
Since 2015, [[Fiat Powertrain]] manufactures the all-new [[Alfa Romeo 690T engine|690T]], Ferrari-derived 90° V6 [[twin-turbo]] engine for the [[Alfa Romeo Giulia (952)|Giulia Quadrifoglio]], [[Alfa Romeo Stelvio|Stelvio Quadrifoglio]] and Giulia GTA/GTA-m models.
==See also== * [[Alfa Romeo Twin Cam engine]] * [[Alfa Romeo Twin Spark engine]]
== Notes == {{reflist}}
==Further reading== * ''The Alfa Romeo V6 Engine High-Performance Manual'', Jim Kartalamakis, Veloce Publishing, {{ISBN|978-1-84584-021-1}}. {{Alfa Romeo}}
[[Category:Alfa Romeo engines|V6]] [[Category:Gasoline engines by model]] [[Category:V6 engines]] [[Category:Products and services discontinued in 2005]] [[Category:1970s automobile engines]]