Alfa Romeo Flat-4 engine

Alfa Romeo Flat-4 engine

Manufacturer	Alfa Romeo
Production	1971–1997
Configuration	DOHC 2/4-valve F4
Displacement	1,186 cc 1,286 cc 1,351 cc 1,490 cc 1,596 cc 1,712 cc
Cylinder block alloy	cast-iron
Cylinder head alloy	aluminium alloy
Fuel system	1 or 2 carburetor Bosch LE 3.1 Jetronic
Fuel type	Petrol
Oil system	4-4,5 L
Cooling system	Watercooled
Power output	63 PS (46 kW)-137 PS (101 kW)

Alfa Romeo developed a water-cooled flat-4 engine for their new Alfasud, introduced in 1971 at the Turin Motor Show.^[1]

1200

The original engine displaced 1.2 L (1,186 cc) with an 80 mm bore and 59 mm stroke and produced between 63 and 77 PS (46 and 57 kW).^[2]

Applications:

• 1971-1983 Alfa Romeo Alfasud
• 1984-1986 Alfa Romeo Arna^[3]
• 1984-1986 Nissan Cherry Europe (rebadged Alfa Romeo Arna, sold also as Nissan Pulsar Milano in Japan) ^[3]
• 1983-1995 Alfa Romeo 33 (late versions for export only)^[4]

1300

The engine was stroked (to 64 mm) to create the 1.3 L (1,286 cc) version. This engine produced 75 PS (55 kW).

Applications:

• 1977-1983 Alfa Romeo Alfasud
• 1978-1983 Alfa Romeo Sprint

1400

The 1.4 L (1,351 cc) was usually labelled a "1.3" in spite of its displacement. It produced 75–86 PS (55–63 kW) with one or two double-barrel carburettors.^[5] It retained the 80 mm bore but used the 1500's 67.2 mm crankshaft.^[2]

Applications:

• 1978-1983 Alfa Romeo Alfasud
• 1978-1989 Alfa Romeo Sprint
• 1983-1995 Alfa Romeo 33
• 1994-1997 Alfa Romeo 145
• 1995-1997 Alfa Romeo 146

1500

Engine of Alfa Romeo Arna 1.5 Ti.

From 1978 until October 1986, the largest member of the family was the 1.5 L (1,490 cc) "1500" (84.0 x 67.2 mm bore and stroke).^[2] It was built until 1995 and produced 85 to 105 PS (63 to 77 kW). This is the largest engine to have been installed in Alfasuds.

Applications:

• 1978-1983 Alfa Romeo Alfasud
• 1978-1989 Alfa Romeo Sprint
• 1984-1986 Alfa Romeo Arna
• 1983-1995 Alfa Romeo 33
• 1985-1986 Clan Clover
• 1984-1986 Nissan Cherry Europe

1600

The 1.6 L (1,596 cc) produced 103 PS (76 kW). Bore and stroke is 84.0 x 72.0 mm.^[6]

Applications:

• 1994-1997 Alfa Romeo 145
• 1995-1997 Alfa Romeo 146

1700

In October 1986 the engine was increased in size to 1.7 L (1,712 cc), it was used in the 33 and later Sprints, power was between 105 and 118 PS (77 and 87 kW).^[6] Bore and stroke is 87.0 x 72.0 mm.^[4]

Applications:

• 1986.10-1995 Alfa Romeo 33
• 1986.10–1989 Alfa Romeo Sprint

1700 16V

In January 1990 a quad-cam 16-valve version of the venerable boxer was produced; it was the most powerful to date, with 129–137 PS (95–101 kW) with or without catalytic converters. Only available in fuel-injected form, the 1.7 16V was equipped with the Bosch ML 4.1 Motronic system.^[6]

The last Alfa Romeo flat-4 was produced in 1997, after a run of 26 years.

Applications:

• 1990.01-1995 Alfa Romeo 33
• 1994-1997 Alfa Romeo 145
• 1995-1997 Alfa Romeo 146

References