Acura B20B Specs

Acura B20B engine specs: 121.8 ci (2L), 4-cylinder, 3.3071" bore x 3.5039" stroke, 8.8:1 compression.

Dimensions

Displacement	121.8 ci / 2 L
Bore	3.3071"
Stroke	3.5039"
Cylinders	4
Compression ratio	8.8:1
Bore/stroke ratio	0.944

Construction

Block material	aluminum
Head material	aluminum
Valvetrain	DOHC
Fuel type	gas
Advertised HP	126 hp

What these numbers mean

Bore/stroke character	0.944 — undersquare — stroke exceeds bore, which favours low-end torque
Mean piston speed at 6,000 RPM	3,504 ft/min — in the range typical of performance street engines
Displacement per cylinder	30.4 ci
Static compression	8.8:1 — low by modern standards, generally happy on regular pump fuel

Run the numbers for this engine

Each link opens the calculator with this engine's specs already filled in.

• Displacement calculator
• Compression ratio calculator
• Piston ring gap calculator
• Piston speed calculator
• Carburetor CFM calculator

Vehicles (1)

• Honda CR-V (RD1/RD2)

Similar engines

• Acura B20Z — 121.8 ci
• Acura Honda B-series · 3.189" × 3.504" · 9.2:1 — 110 ci
• Acura Honda B-series · 3.189" × 3.433" · 10:1 — 110 ci
• Acura B18C5 — 110 ci
• Acura F20C — 121.9 ci
• Acura K20A — 121.9 ci
• Nissan RB · 3.071" × 2.744" · 9.5:1 — 121.8 ci
• Nissan RB · 3.071" × 2.744" · 8.5:1 — 121.8 ci

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