Alfa Romeo Flat-4 engine

Infobox Automobile engine
name=Alfa Romeo Flat-4 engine
manufacturer=Alfa Romeo
production=1971–1995
type=DOHC 2/4-valve F4
displacement =1186 cc
1286 cc
1351 cc
1490 cc
1712 cc
block =cast-iron
head =aluminium alloy
fuelsystem =1 or 2 carburetor
Bosch LE 3.1 Jetronic
oilsystem = ca 4,5 L
power = Convert|63|hp|kW|0|abbr=on-Convert|137|hp|kW|0|abbr=on
coolingsystem = Watercooled
fueltype = Petrol
predecessor=
successor=

Alfa Romeo developed a water cooled flat-4 engine for their new Alfasud, introduced in 1971.

1200

The original engine displaced 1.2 L (1186 cc) with an 80 mm bore and 59 mm stroke and produced between Convert|63|hp|kW|0|abbr=on-Convert|68|hp|kW|0|abbr=on

Applications:
* 1971-1983 Alfa Romeo Alfasud
* 1984-1986 Alfa Romeo Arna
* 1984-1986 Nissan Cherry "Europe"
* 1983-1995 Alfa Romeo 33

1300

The engine was stroked (to 64 mm) to create the 1.3 L (1286 cc) version. This engine produced 75 hp (56 kW).

Applications:
* 1977-1983 Alfa Romeo Alfasud
* 1983-1995 Alfa Romeo 33

1400

A rare version was the 1.4 L (1351 cc) variant with Convert|79|hp|kW|0|abbr=on.

Applications:
* 1978-1983 Alfa Romeo Alfasud
* 1983-1995 Alfa Romeo 33

1500

From 1978 until 1987, the largest member of the family was the 1.5 L (1490 cc) "1500". It produced 85 to 105 hp (63 to 78 kW).This is the largest engine to be naturally found in Alfasuds, though many have picked them up over subsequent years.

Applications:
* 1978-1983 Alfa Romeo Alfasud
* 1984-1986 Alfa Romeo Arna
* 1984-1986 Nissan Cherry "Europe"
* 1983-1995 Alfa Romeo 33
* 1985-1986 Clan Clover

1700

In 1986 the engine was increased in size to 1712 cc, it was used in the 33 and later Sprints, power was between Convert|106|hp|kW|0|abbr=on-Convert|116|hp|kW|0|abbr=on.

Applications:
* 1983-1995 Alfa Romeo 33
* 1976–1989 Alfa Romeo Sprint

1700 16V

In 1990 a quad cam 16 valve version of the venerable boxer was produced, it was the most powerful to date with Convert|137|hp|kW|0|abbr=on. Only available in fuel injected form, the 1.7 16V was equipped with the Bosch ML 4.1 system.

The last Alfa Romeo flat-4 was produced in 1995, a run of 24 years.

Applications:
* 1983-1995 Alfa Romeo 33