Lancia Flat-4 engine

Flat-4 engine
Boxer engine installed in a Lancia Flavia
Overview
Production1960-1984
Layout
ConfigurationNaturally 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 materialLight alloy
Cylinder head materialAluminum
ValvetrainPushrod or Overhead camshaft
Combustion
Fuel system
Fuel typePetrol
Cooling systemWater-cooled
Output
Power output92–140 bhp (69–104 kW; 93–142 PS)
Torque output172–208 N⋅m (127–153 lb⋅ft)
Chronology
PredecessorLancia 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.

  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.