Lancia Flat-4 engine

Flat-4 engine
Flat-4 engine
	Boxer engine installed in a Lancia Flavia
Overview
Production	1960-1984
Layout
Configuration	Naturally aspirated Flat-4
Displacement	1.5 L; 90.8 cu in (1,488 cc); 1.5 L; 90.9 cu in (1,490 cc); 1.5 L; 91.5 cu in (1,500 cc); 1.7 L; 105.4 cu in (1,727 cc); 1.8 L; 109.8 cu in (1,800 cc); 1.8 L; 110.8 cu in (1,816 cc); 2.0 L; 121.5 cu in (1,991 cc); 2.0 L; 122.0 cu in (1,999 cc); 2.5 L; 151.6 cu in (2,484 cc);
Cylinder bore	77 mm (3.03 in); 80 mm (3.15 in); 82 mm (3.23 in); 88 mm (3.46 in); 89 mm (3.5 in);
Piston stroke	71 mm (2.8 in); 74 mm (2.91 in); 80 mm (3.15 in); 85 mm (3.35 in);
Cylinder block material	Light alloy
Cylinder head material	Aluminum
Valvetrain	Pushrod or Overhead camshaft
Combustion
Fuel system	Twin-choke Weber carburetor; Fuel injection;
Fuel type	Petrol
Cooling system	Water-cooled
Output
Power output	92–140 bhp (69–104 kW; 93–142 PS)
Torque output	172–208 N⋅m (127–153 lb⋅ft)
Chronology
Predecessor	Lancia V4 engine

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The Lancia Flat-4 engine is an aluminum, pushrod, and later overhead camshaft, flat-four (boxer) engine made by Lancia, initially for the Flavia, from 1960 through 1984. Though it was designed as a pushrod engine, it was advanced for the time.^[1] The pushrod version of the Lancia boxer was only ever used in the Flavia, and its derivatives including the Lancia 2000. In 1976, a new overhead cam engine based on a similar layout was designed and brought into production in 2 and 2.5-litre displacements for the Gamma.

^ Koch, Jeff (April 2008). "Lancia Flavia 1.8 Coupe vs. Alfa GTV 1750". Hemmings Motor News. American City Business Journals. Retrieved 28 December 2013. Lancia's four has its cylinders horizontally-opposed, à la Porsche (or VW Beetle if you're uncharitable)--except it's water-cooled, hanging out over the nose, and driving the front wheels. Power, even at 92 bhp (69 kW; 93 PS), was far beyond VW's modest output in those days, even allowing for the displacement discrepancy.

[1] Koch, Jeff (April 2008). "Lancia Flavia 1.8 Coupe vs. Alfa GTV 1750". Hemmings Motor News. American City Business Journals. Retrieved 28 December 2013. Lancia's four has its cylinders horizontally-opposed, à la Porsche (or VW Beetle if you're uncharitable)--except it's water-cooled, hanging out over the nose, and driving the front wheels. Power, even at 92 bhp (69 kW; 93 PS), was far beyond VW's modest output in those days, even allowing for the displacement discrepancy.

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