Subaru EF engine

The EF is an automotive engine made by Subaru, introduced in 1984 for the Subaru Justy. It is a water-cooled, straight-three, 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 with a bore spacing of 86.0 mm (3.39 in). The two-cylinder EK23 engine is closely related to the EF series, sharing the same bore spacing and overall design.^[1] The export market 665 cc EK42 motor even shares the bore and stroke of the EF10.

EF12 MPFI engine in a 1993 Subaru Justy

It is the first Subaru engine to incorporate the displacement in its name, and the only iron block Subaru ever.

EF10

1.0-litre (997 cc) two valves per cylinder

Subaru EF-10 Engine

Bore x Stroke: 78 mm (3.1 in) x 69.6 mm (2.7 in)

Power:

• 47 bhp (35 kW; 48 PS) at 5000 rpm/59 lb⋅ft (80 N⋅m) at 3200 rpm with single barrel Hitachi carburetor and 9.5:1 compression ratio
• 54 bhp (40 kW; 55 PS) at 6000 rpm/59 lb⋅ft (80 N⋅m) at 3600 rpm with dual barrel Hitachi carburetor and 9.5:1 compression ratio

Usage:

• Subaru Justy "J10" (limited to some European markets and Asia)
• Subaru Libero "E10"

EF12

1.2-litre (1189 cc) three valves per cylinder

Subaru EF-12 Engine

Bore x Stroke: 78 mm (3.1 in) x 83 mm (3.3 in)

Power:

• 66 bhp (49 kW; 67 PS) at 5200 rpm/70 lb⋅ft (95 N⋅m) at 3600 rpm with two barrel Hitachi carburetor and 9:1 compression ratio
• 73 bhp (54 kW; 74 PS) at 5600 rpm/71 lb⋅ft (96 N⋅m) at 3600 rpm with multi-port fuel injection and 9.1:1 compression ratio

Usage:

• Subaru Justy "J12"
• Subaru Libero "E12"

Power:

• 80 bhp (60 kW; 81 PS) with multi-point fuel injection

Usage:

• Subaru Tutto (Taiwan)

External links

• Subaru
• Dusty's Justys