Alfa Romeo Twin Cam engine

Alfa Romeo Twin Cam engine
Overview
Manufacturer	Alfa Romeo (1954-1986) Alfa Lancia Industriale (1987-1991) Fiat Auto (1991-1994)
Designer	Giuseppe Busso
Also called	Nord engine
Production	1954–1994
Layout
Configuration	Inline-4 engine
Displacement	0.9 L; 54.7 cu in (896 cc) 1.3 L; 78.3 cu in (1,283 cc) 1.3 L; 78.7 cu in (1,290 cc) 1.4 L; 82.8 cu in (1,357 cc) 1.5 L; 90.9 cu in (1,489 cc) 1.6 L; 95.6 cu in (1,567 cc) 1.7 L; 106.7 cu in (1,749 cc) 1.8 L; 108.2 cu in (1,773 cc) 1.8 L; 108.6 cu in (1,779 cc) 2.0 L; 119.7 cu in (1,962 cc) 2.0 L; 121.7 cu in (1,995 cc) 2.1 L; 125.5 cu in (2,056 cc)
Cylinder bore	66 mm (2.60 in) 74 mm (2.91 in) 78 mm (3.07 in) 79.5 mm (3.13 in) 80 mm (3.15 in) 83.4 mm (3.28 in) 84 mm (3.31 in) 86 mm (3.39 in)
Piston stroke	57.9 mm (2.28 in) 65.5 mm (2.58 in) 67.5 mm (2.66 in) 75 mm (2.95 in) 80 mm (3.15 in) 82 mm (3.23 in) 88.5 mm (3.48 in)
Cylinder block material	Aluminium
Cylinder head material	Aluminium
Valvetrain	DOHC 2 valves per cylinder (some racing heads had 4 valves per cylinder)
Combustion
Turbocharger	Avio, KKK (some versions)
Fuel system	Dual Dell'Orto DHLA40H pressurised carburetors, Electronic fuel injection
Fuel type	Gasoline
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	From 52 to 300 bhp (39 to 224 kW; 53 to 304 PS)
Chronology
Predecessor	Alfa Romeo 1900 I4
Successor	Alfa Romeo Twin Spark

The Alfa Romeo Twin Cam engine is an all-alloy inline-four engine series produced by Alfa Romeo from 1954 to 1994. In Italian it is known as the "bialbero" ("twin-shaft"), and has also been nicknamed the "Nord" (North) engine in reference to its being built in Portello, Milan (later Arese, close to Milan), in the North of Italy and to distinguish it from the Alfa Romeo Boxer engine built in the South (Sud) for the Alfasud.