Alfa Romeo V6 engine

Infobox Automobile engine


name=Alfa Romeo V6 engine
aka =
manufacturer=Alfa Romeo
type =S/DOHC 60° 2/4-valve V6
production=1979–2005
predecessor =
successor=JTS engine
bore =
stroke =
displacement =2.0 L (1997 cc/122 in³)
2.5 L (2492 cc/152 in³)
3.0 L (2959 cc/181 in³)
3.2 L (3179 cc/194 in³)
length =
diameter =
width =
height =
weight =convert|375|lb|kg|abbr=on Alfa Romeo SOHC V6Cite web|url=http://www.team.net/sol/tech/engine.html|title=Engine Weight FYI|accessdate=2007-12-20|year=1981|author=Jan Norbye|work=Complete Handbook of Automotive Power Trains]
block =aluminium alloy
head =aluminium alloy
valvetrain =
supercharger =
turbocharger =
fuelsystem =
fueltype =Petrol
oilsystem =
coolingsystem =Watercooled
power =97 kW (132 PS) - 184 kW (250 PS)
specpower =
torque =
compression =8.00:1 - 10.50:1
fuelcon =
specfuelcon =
oilcon =

Alfa Romeo's in-house V6 engine design made its initial début in 1979 in the Alfa 6, later attaining fame under the hood of the Alfa Romeo 164.Fact|date=August 2008 Introduced in 2.5 L guise, production engines would eventually range from 2.0 L to 3.2 L displacement. With modifications it is possible to increase engine displacement to 3.8 L. Initially developed in the early 1970s by Giuseppe Busso, the original SOHC 12-valve design employed short push-rods to operate the exhaust valves in a design similar to that of earlier BMW / Bristol engines. In 1993, the first DOHC version of this engine appeared powering the Alfa Romeo 164.

The V6 production ended in 2005 at Alfa Romeo's Arese plant,Cite web|url=http://www.italiaspeed.com/2005/cars/alfa_romeo/02/arese/2302.html|title=News 25.02.2005|accessdate=2008-01-07|work=italiaspeed.com] replaced in the 159 and Brera by a new 3.2 L V6 unit combining a General Motors-designed engine block with Alfa-Romeo cylinder heads and induction.

2.0

A 2.0 L (1997 cc/122 in³) version was introduced in 1983. Both carburettor convert|132|PS|kW hp|0|lk=on|abbr=on and fuel injected versions were available from the start.A 2.0 turbocharged version, derived from the 3.0 L 12v, was introduced in 1991 in the Alfa Romeo 164 with convert|210|PS|kW hp|0|abbr=on.

Applications:
* 1983–1986 Alfa Romeo Alfa 6
* 1984–1987 Alfa Romeo 90
* 1991–1992 Alfa Romeo 164 (2.0 L turbo)
* 1995–2005 Alfa Romeo GTV & Spider (2.0 L turbo)
* 1998–? Alfa Romeo 166 (2.0 L turbo)

2.5

The original engine displaced 2.5 L (2492 cc/152 in³) and produced convert|158|PS|kW hp|0|abbr=on. It was a 2-valve per cylinder design with a single belt-driven camshaft per cylinder bank and six carburettors fitted.

Fuel injection was added for the 1983 Alfa 6, which produced the same convert|158|PS|kW hp|0|abbr=on. The 2-valve engine ended its life in the Alfa 155, where there were two series for this engine, the 2.5 L developing convert|166|PS|kW hp|0|abbr=on.

Applications:
* 1979–1986 Alfa Romeo Alfa 6
* 1980–1986 Alfa Romeo GTV6
* 1984–1987 Alfa Romeo 90
* 1985–1991 Alfa Romeo 75/Milano
* 1992–1997 Alfa Romeo 155
* 1985–1996 Fiat Croma

Four-valve

A four-valve version was introduced in 1997 with the Alfa Romeo 156. The engine now produced convert|190|PS|kW hp|0|abbr=on. In 2001, the V6 was uprated to convert|192|PS|kW hp|0|abbr=on. 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. The engine has a convert|88|mm|in|abbr=on bore and a convert|68.3|mm|in|abbr=on stroke.Cite web|url=http://www.alfisti.ru/156/technica.htm#25|title=TECHNICAL SPECIFICIFICATIONS|accessdate=2008-01-28|work=alfisti.ru]

Applications:
* 1997–2005 Alfa Romeo 156
* 1998–2007 Alfa Romeo 166

3.0

The 2.5 L engine was bored and stroked out to 3.0 L (2959 cc/180 in³) for the 1987 75/Milano Verde, where it produced convert|185|PS|kW hp|0|abbr=on, still with 2 valves per cylinder. This engine was modified for transverse placement in the 164 and fitted with a high-performance camshaft and low-restriction exhaust, producing convert|200|PS|kW hp|0|abbr=on.

Applications:
* 1987–1991 Alfa Romeo 75/Milano
* 1989–1991 Alfa Romeo SZ
* 1984–1994 Lancia Thema
* 1986–1992 Alfa Romeo 164
* 1995–2005 Alfa Romeo GTV & Spider

Four-valve

The engine was upgraded to dual overhead cams and four valves per cylinder in 1993. Due to this and other refinements, this engine produced convert|211|PS|kW hp|0|abbr=on for the regular 1993 164, and convert|232|PS|kW hp|0|abbr=on and convert|276|Nm|ftlbf|abbr=on in the 164 Quadrifoglio.

Applications:
* 1993–1996 Alfa Romeo 164
* 1995–2003 Alfa Romeo GTV & Spider
* 1998–2005 Alfa Romeo 166
* 1994–2001 Lancia Kappa
* 1998–present Gillet Vertigo

3.2

In 2002 Alfa Romeo introduced the 156 GTA with a 3.2 L (3179 cc/194 in³) version of the V6 with convert|250|PS|kW hp|0|abbr=on and convert|300|Nm|ftlbf|abbr=on of torque. Later this engine was also used in the Alfa Romeo 166, GTV, Spider and Alfa Romeo GT in a slightly detuned form convert|240|PS|kW hp|0|abbr=on. The engine has a convert|93|mm|in|abbr=on bore and a convert|78|mm|in|abbr=on stroke.Cite web|url=http://www.italiaspeed.com/newmodels_147gta_01.html|title=Alfa Romeo 147 GTA|accessdate=2008-01-28|work=www.italiaspeed.com]

Applications:
* 2002–2005 Alfa Romeo 156 GTA
* 2002–2005 Alfa Romeo 147 GTA
* 2004–2007 Alfa Romeo GT
* 2003–2005 Alfa Romeo 166
* 2003–2005 Alfa Romeo GTV & Spider
* 2001–2006 Lancia Thesis

Notes