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| Ford I4 DOHC | |
|---|---|
 The cylinder head with camshafts | |
| Overview | |
| Manufacturer | Ford Motor Company |
| Production | 1989-2006 |
| Layout | |
| Configuration | Naturally aspirated Inline-4 |
| Displacement | 2.0–2.3 L (1,998–2,295 cc) |
| Cylinder bore | 86 mm (3.39 in) 89.6 mm (3.53 in) |
| Piston stroke | 86 mm (3.39 in) 91 mm (3.58 in) |
| Valvetrain | DOHC 2 & 4 valves x cyl. |
| Compression ratio | 9.8:1, 10.0:1, 10.3:1 |
| RPM range | |
| Max. engine speed | 6050 |
| Combustion | |
| Fuel system | Carbureted (on N8A) Multi-point fuel injection |
| Fuel type | Petrol |
| Cooling system | Water-cooled |
| Output | |
| Power output | 107–150 hp (80–112 kW) |
| Torque output | 171–210 N⋅m (126–155 lb⋅ft) |
| Emissions | |
| Emissions control systems | Catalytic converter (on N9C/N9E/NSD/NSE/N9D) |
The Ford I4 DOHC engine is a cast iron block 4-cylinder inline internal combustion engine with twin overhead camshafts, produced by the Ford Motor Company at Dagenham Engine Plant. It was initially available as a 2.0 litre 8-valve version, and later in 2.0 and 2.3 litre 16-valve versions from 1989 to the end of production of the MK2 Ford Galaxy in 2006. It powered various Ford models during this time, but was most well known in the rear-wheel drive "Twin Cam" variants of the Ford Sierra and Ford Scorpio. Despite being built for the company's larger RWD models, Ford also employed the engine in the front-wheel drive Galaxy and the Escort RS 2000 16v.