Mazda 20B-REW Specs

Mazda 20B-REW engine specs: 119.7 ci (1.962L), 3-cylinder, 4.1339" bore x 3.1496" stroke, 9:1 compression.

Dimensions

Displacement119.7 ci / 1.962 L
Bore4.1339"
Stroke3.1496"
Cylinders3
Compression ratio9:1
Bore/stroke ratio1.313

Construction

Block materialaluminum
Head materialaluminum
ValvetrainRotary
Fuel typegas
Advertised HP280 hp

What these numbers mean

Bore/stroke character1.313 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM3,150 ft/min — conservative for a street engine
Displacement per cylinder39.9 ci
Static compression9:1 — low by modern standards, generally happy on regular pump fuel

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