Alfa Romeo V6 engine

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Alfa Romeo V6 engine
Manufacturer	Alfa Romeo
Production	1979–
Class	S/DOHC 2/4-valve V6
Predecessor
Successor
Engine

Alfa Romeo's in-house V6 engine debuted in 1979 with the Alfa 6, and became famous in the later 164. First engine introduced for markets was 2.5 L version. Alfa Romeo V6 engine is possibile to make up to 3.8 L.

2.0

2.0  L (1997cc) version was introduced in 1983. Same year came carburetor (135 hp,99 kW) and fuel injected versions. 2.0 turbo version was introduced in 1991.

Applications:

• 1979–1986 Alfa Romeo Alfa 6
• 1984–1987 Alfa Romeo 90
• 1986–1992 Alfa Romeo 164 (2.0  L turbo)
• 1995–present Alfa Romeo GTV & Spider (2.0  L turbo)
• 1998–present Alfa Romeo 166 (2.0  L turbo)

2.5

The original engine displaced 2.5 L (2492cc) and produced 154 hp (115 kW). It was a 2-valve design with a single belt-driven camshaft per cylinder bank. Six carburettors were fitted.

Fuel injection was added for the 1983 Alfa 6, which produced 158 hp (116 kW).

Applications:

• 1979–1986 Alfa Romeo Alfa 6
• 1980–1986 Alfa Romeo GTV6
• 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 Alfa Romeo 156. Engine produced now 190 hp (140 kW). Year 2001 engine was producing 192 hp (141 kW). 166 used slightly detuned versions to make more low rev torque. This engine version was awarded with International Engine of the Year award in 2000.

Applications:

• 1997–2005 Alfa Romeo 156
• 1998–present Alfa Romeo 166

3.0

The engine was bored and stroked to 3.0 L (2959 cc/180 in³) for the 1987 75/Milano Verde, where it produced 183 hp (136 kW), 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 an even 200 hp (149 kW).

Applications:

• 1987–1991 Alfa Romeo 75/Milano
• 1989–1991 Alfa Romeo SZ
• 1984–1994 Lancia Thema
• 1986–1992 Alfa Romeo 164
• 1995–???? Alfa Romeo GTV & Spider (only fitted to Spider)

Four-valve

The engine was upgraded to dual overhead cams and four valves per cylinder in 1993. Along with other refinements, this engine produced 210 hp (157 kW) and 198 ft·lbf (268 N·m) for the regular 1993 164 and 230 hp (172 kW) and 202 ft·lbf (274 N·m) 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– Gillet Vertigo

3.2

2002 was introduced Alfa Romeo 156 GTA with 3.2 L (3179cc) version with 250 hp (184 kW) and 300 Nm. Later this engine was also used in Alfa Romeo 166 and Alfa Romeo GT in slightly detuned form (240hp)

Applications:

• 2002–2005 Alfa Romeo 156 GTA
• 2002–2005 Alfa Romeo 147 GTA
• 2004–present Alfa Romeo GT
• 2003–2005 Alfa Romeo 166
• 2003–2005 Alfa Romeo GTV & Spider
• 2001–present Lancia Thesis

Years	Engine	Cylindrates
1954–1994	Twin Cam	1290, 1570, 1750, 1779, 1962
1992–present	TwinSpark	1.4, 1.6, 1.7, 1.8, 2.0
1971–1995	Flat-4	1186, 1286, 1350, 1490, 1712
1979–2006	V6	2.0, 2.5, 3.0, 3.2
2006–present	GM based V6	3.2