| 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.