Acura H23A Specs

Acura H23A engine specs: 139.6 ci (2.289L), 4-cylinder, 3.4252" bore x 3.7402" stroke, 9.8:1 compression.

Dimensions

Displacement	139.6 ci / 2.289 L
Bore	3.4252"
Stroke	3.7402"
Cylinders	4
Compression ratio	9.8:1
Bore/stroke ratio	0.916

Construction

Block material	aluminum
Head material	aluminum
Valvetrain	DOHC
Fuel type	gas
Advertised HP	200 hp

What these numbers mean

Bore/stroke character	0.916 — undersquare — stroke exceeds bore, which favours low-end torque
Mean piston speed at 6,000 RPM	3,740 ft/min — in the range typical of performance street engines
Displacement per cylinder	34.9 ci
Static compression	9.8:1 — in the range that usually runs on pump premium

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 (2)

• Honda Accord Wagon SiR (JDM)
• Honda Prelude SiR (JDM)

Similar engines

• Acura H22A7 — 132.7 ci
• Acura Honda H-series · 3.425" × 3.571" · 10:1 — 132.7 ci
• Acura H22A — 132.7 ci
• Acura K23A1 — 140.3 ci
• Acura Honda K-series · 3.425" × 3.898" · 10.5:1 — 144 ci
• Acura K24A — 144 ci
• Chevrolet Chevrolet 140ci · 3.501" × 3.625" · 9.501:1 — 140 ci
• Ford SCTi — 140 ci

← All Honda H-series engines