Hyundai G4KM Specs

Hyundai G4KM engine specs: 152.6 ci (2.5L), 4-cylinder, 3.4843" bore x 3.9961" stroke, 11.3:1 compression.

Dimensions

Displacement152.6 ci / 2.5 L
Bore3.4843"
Stroke3.9961"
Cylinders4
Compression ratio11.3:1
Bore/stroke ratio0.872

Construction

Block materialaluminum
Head materialaluminum
ValvetrainDOHC
Fuel typegas
Advertised HP191 hp

What these numbers mean

Bore/stroke character0.872 — undersquare — stroke exceeds bore, which favours low-end torque
Mean piston speed at 6,000 RPM3,996 ft/min — in the range typical of performance street engines
Displacement per cylinder38.1 ci
Static compression11.3:1 — high enough that pump premium or better is normally required

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