Circle L engine

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Circle L engine
Combustion chamber
Configuration I4
Displacement 1,686 cc (102.9 cu in)
Cylinder bore 79 mm (3.1 in)
Piston stroke 86 mm (3.4 in)
Valvetrain DOHC
Compression ratio 16.5:1
Fuel type Diesel
Oil system Wet sump
Cooling system Water-cooled
Power output 55–96 kW (74–129 hp)
Specific power 165–300 N·m (122–221 lb·ft)

The Circle L is an automobile engine produced by GM Powertrain Poland in Poland. It is a 1,686 cc (1.686 L; 102.9 cu in) Diesel straight-4 originally designed by Isuzu but now owned by General Motors. The engine is used in Europe by GM's Opel subsidiary and by Honda.


The Honda version features common rail direct injection technology, while the Opel 4EE2 unit uses low-pressure DI. Honda's purchase of the Circle-L engines was reciprocated by GM's purchase of the J35A3 V6.



The 4EE2 produces 55 kW (74 hp) at 4400 rpm and 165 N·m (122  lb·ft) at 1800 rpm.


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