The Lancia Flat-4 engine is an aluminum,

pushrod A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. The intake valves control the flow of air/fuel mixture (or air alone for direct-injected engines) into the combu ...

, and later

overhead camshaft An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustio ...

, flat-four (boxer) engine made by

Lancia Lancia Automobiles S.p.A. () is an Italian car manufacturer and a subsidiary of Stellantis Europe, which is the European subsidiary of Stellantis. The present legal entity of Lancia was formed in January 2007 when its corporate parent reorganise ...

, initially for the Flavia, from 1960 through 1984. Though it was designed as a pushrod engine, it was advanced for the time. The pushrod version of the Lancia boxer was only ever used in the Flavia, and its derivatives including the

Lancia 2000 The Lancia 2000 (Tipo 820) is a series of automobiles produced by Italian automaker Lancia between 1971 and 1975. It was the last vehicle independently designed by Lancia engineers before the marque's acquisition by Fiat in 1969. The 2000 was a d ...

. In 1976, a new

overhead cam An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combusti ...

engine based on a similar layout was designed and brought into production in 2 and 2.5-litre displacements for the

Gamma Gamma (; uppercase , lowercase ; ) is the third letter of the Greek alphabet. In the system of Greek numerals it has a value of 3. In Ancient Greek, the letter gamma represented a voiced velar stop . In Modern Greek, this letter normally repr ...

Pushrod

1500

The original version was the introduced in 1960; it used an bore and stroke. It was revised on 1963 with a smaller bore and a longer stroke, thus displacing . A final version was introduced in 1967 with an even longer stroke coupled with a bore, giving a displacement of . Production ceased in 1970.

1800

The first 1800 was a introduced in 1962. It used an bore and stroke. One year later it was replaced by a true engine thanks to a longer stroke. In 1967 appeared the version using an bore and stroke.

2000

The 2000 version was the ultimate Flavia engine. Bore and stroke was for a good

oversquare Stroke ratio, today universally defined as bore/stroke ratio, is a term to describe the ratio between cylinder bore diameter and piston stroke length in a reciprocating piston engine. This can be used for either an internal combustion engine ...

ratio. In 1971, the 2.0 L produced , and in the HF

Coupé A coupe or coupé (, ) is a passenger car with a sloping or truncated rear roofline and typically with two doors. The term ''coupé'' was first applied to horse-drawn carriages for two passengers without rear-facing seats. It comes from the Fr ...

in 1972 it produced . This engine was produced from 1968 through 1974.

OHC

Lancia developed the large light-alloy

2.0-litre and 2.5-litre flat-4 engines specifically for the

Lancia Gamma The Lancia Gamma (Tipo 830), stylised Lancia γ, is an executive car (E-segment in Europe) manufactured and marketed by the Lancia subdivision of Fiat. Following its debut at the 1976 Geneva Motor Show as Lancia's new flagship, the Gamma was ma ...

, rather than using Fiat derived engines as used in the Beta and Montecarlo and were in production between 1976 and 1984. Lancia Gamma Engine

2000

Replacing the 2.0 L pushrod engine used in the Flavia, the new OHC engine produced at 5500 rpm and of torque at 3500 rpm.

2500

The engine was initially available with twin-

choke Choke may refer to: Entertainment Albums and songs * ''Choke'' (album), a 1990 album by the Beautiful South * "Choke" (I Dont Know How But They Found Me song), a 2017 song from the album ''1981 Extended Play'' * ''Choke'' (Kiss It Goodbye ...

Weber carburetor Weber Carburetors is an automotive manufacturing company founded in 1923, known for their carburetors. History Eduardo Weber began his automotive career working for Fiat, first at their Turin plant (in 1914) and later at a dealership in Bologn ...

s, but in the last few years of production it was equipped with

fuel injection Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of a fuel injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All c ...

. In both forms, it produced at 5400 rpm and torque at 3000 rpm. Car Catalogue International 1983, page 53

References

{{Lancia

Flat-4 A flat-four engine, also known as a horizontally opposed-four engine or boxer engine, is a four-cylinder piston engine with two banks of cylinders lying on opposite sides of a common crankshaft. The most common type of flat-four engine is the box ...

Boxer engines Gasoline engines by model