Mercury 2.3L I4 Specs

Mercury 2.3L I4 engine specs: 140 ci (2.3L), 4-cylinder, 3.7795" bore x 3.126" stroke, 9:1 compression.

Dimensions

Displacement140 ci / 2.3 L
Bore3.7795"
Stroke3.126"
Cylinders4
Compression ratio9:1
Bore/stroke ratio1.209

Construction

Block materialcast iron
Head materialcast iron
ValvetrainSOHC
Fuel typegas
Advertised HP88 hp

What these numbers mean

Bore/stroke character1.209 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM3,126 ft/min — conservative for a street engine
Displacement per cylinder35.0 ci
Static compression9:1 — low by modern standards, generally happy on regular pump fuel

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Variants sharing these dimensions (2)

These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.

YearAdvertised HPCode
88 hp2.3L I4
88 hp2.3L, 2.3L I4

Vehicles (8)

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