Plymouth 20 Neon I4 Specs

Plymouth 20 Neon I4 engine specs: 122 ci (2L), 4-cylinder, 3.4449" bore x 3.2677" stroke, 9.8:1 compression.

Dimensions

Displacement122 ci / 2 L
Bore3.4449"
Stroke3.2677"
Cylinders4
Compression ratio9.8:1
Bore/stroke ratio1.054

Construction

Block materialcast iron
Head materialaluminum
ValvetrainSOHC
Fuel typegas
Advertised HP132 hp

What these numbers mean

Bore/stroke character1.054 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM3,268 ft/min — conservative for a street engine
Displacement per cylinder30.5 ci
Static compression9.8:1 — in the range that usually runs on pump premium

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