GM Family 0 engine
Overview
 
The Family 0 is a family of inline
Straight engine
Usually found in four- and six-cylinder configurations, the straight engine, or inline engine is an internal-combustion engine with all cylinders aligned in one row, with no offset...

 piston engines that was developed by GM Powertrain Torino, a subsidiary of Opel
Opel
Adam Opel AG, generally shortened to Opel, is a German automobile company founded by Adam Opel in 1862. Opel has been building automobiles since 1899, and became an Aktiengesellschaft in 1929...

, as a low-displacement engine for use on entry-level subcompact cars from Opel
Opel
Adam Opel AG, generally shortened to Opel, is a German automobile company founded by Adam Opel in 1862. Opel has been building automobiles since 1899, and became an Aktiengesellschaft in 1929...

/Vauxhall
Vauxhall Motors
Vauxhall Motors is a British automotive company owned by General Motors and headquartered in Luton. It was founded in 1857 as a pump and marine engine manufacturer, began manufacturing cars in 1903 and was acquired by GM in 1925. It has been the second-largest selling car brand in the UK for...

.

The engine features light cast-iron engine block, aluminum cylinder head
Cylinder head
In an internal combustion engine, the cylinder head sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket...

 with Hollowcast camshafts and DOHC valvetrains driven by chain
Roller chain
Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire and tube drawing machines, printing presses, cars, motorcycles, and simple machines like...

. Modern versions use variable intake length and VVT
Variable valve timing
In internal combustion engines, variable valve timing , also known as Variable valve actuation , is a generalized term used to describe any mechanism or method that can alter the shape or timing of a valve lift event within an internal combustion engine...

.
The engine was first introduced in 1996 Opel Corsa
Opel Corsa
The front-wheel drive Opel Corsa was first launched in September 1982 to replace the Opel Kadett C City, and to fill the gap vacated as the Kadett grew in size and price. Built in Zaragoza, Spain, the first Corsas were three-door hatchback and two-door saloon models, with four-door and five-door...

 as a 3-cylinder
Straight-3
A straight-three engine, also known as inline-three engine, or a triple, is a reciprocating piston internal combustion engine with three cylinders arranged in a straight line or plane, side by side....

 version.
  • 1.0 L Straight-3
    Straight-3
    A straight-three engine, also known as inline-three engine, or a triple, is a reciprocating piston internal combustion engine with three cylinders arranged in a straight line or plane, side by side....

     (973 cc): 40 kW / 55 hp, 82 newton metre @ 2800 rpm
  • 1.0 L Straight-3
    Straight-3
    A straight-three engine, also known as inline-three engine, or a triple, is a reciprocating piston internal combustion engine with three cylinders arranged in a straight line or plane, side by side....

     (973 cc): 43 kW / 58 hp, 85 newton metre
  • 1.0 L Straight-3
    Straight-3
    A straight-three engine, also known as inline-three engine, or a triple, is a reciprocating piston internal combustion engine with three cylinders arranged in a straight line or plane, side by side....

     (998 cc): 73.4 mm (2.89  in) bore, 78.6 mm (2.94 in) stroke, 10.5:1 compression.
  • 1.2 L Straight-4
    Straight-4
    The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....

     (1199 cc): 72.5 mm (2.85  in) bore, 72.6 mm (2.86 in) stroke, 10.1:1 compression, 75 hp (55 kW) @ 5600 rpm, 110 newton metre @ 4000 rpm
  • 1.2 L Straight-4
    Straight-4
    The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....

     (1229 cc): 73.4 mm (2.89  in) bore, 72.6 mm (2.86 in) stroke, 10.5:1 compression

New, updated version of the engine, introduced in 2003.
 
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