Plymouth RG Specs

Plymouth RG engine specs: 198 ci (3.2L), 6-cylinder, 3.4016" bore x 3.5591" stroke, 8.4:1 compression.

Dimensions

Displacement198 ci / 3.2 L
Bore3.4016"
Stroke3.5591"
Cylinders6
Compression ratio8.4:1
Bore/stroke ratio0.956

Construction

Block materialcast iron
Head materialcast iron
ValvetrainOHV
Fuel typegas
Advertised HP125 hp

What these numbers mean

Bore/stroke character0.956 — square — bore and stroke are within 5%, a balanced compromise
Mean piston speed at 6,000 RPM3,559 ft/min — in the range typical of performance street engines
Displacement per cylinder33.0 ci
Static compression8.4:1 — low by modern standards, generally happy on regular pump fuel

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