The EF is an automotive engine made by Subaru, introduced in 1984 for the Subaru Justy. It is a water-cooled straight-3 four-stroke engine with a belt-driven single overhead camshaft, and a chain-driven balance shaft. It has an alloy cylinder head and a closed deck iron engine block.
1.0-litre (997 cc) two valves per cylinder
Bore x Stroke: 78 mm (3.1 in) x 69.6 mm (2.7 in)
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1.2-litre (1189 cc) three valves per cylinder
Bore x Stroke: 78 mm (3.1 in) x 83 mm (3.3 in)
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