Alfa Romeo Twin Cam engine

Alfa Romeo Twin Cam engine
Overview
ManufacturerAlfa Romeo (1954-1986)
Alfa Lancia Industriale (1987-1991)
Fiat Auto (1991-1994)
DesignerGiuseppe Busso
Also calledNord engine
Production1954–1994
Layout
ConfigurationInline-4 engine
Displacement0.9 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 bore66 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 stroke57.9 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 materialAluminium
Cylinder head materialAluminium
ValvetrainDOHC 2 valves per cylinder
(some racing heads had 4 valves per cylinder)
Combustion
TurbochargerAvio, KKK (some versions)
Fuel systemDual Dell'Orto DHLA40H pressurised carburetors, Electronic fuel injection
Fuel typeGasoline
Oil systemWet sump
Cooling systemWater-cooled
Output
Power outputFrom 52 to 300 bhp (39 to 224 kW; 53 to 304 PS)
Chronology
PredecessorAlfa Romeo 1900 I4
SuccessorAlfa 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.