GMC 235 Specs

GMC 235 engine specs: 235 ci (3.85L), 6-cylinder, 3.8752" bore x 3.3126" stroke, 7.5:1 compression.

Dimensions

Displacement	235 ci / 3.85 L
Bore	3.8752"
Stroke	3.3126"
Cylinders	6
Compression ratio	7.5:1
Bore/stroke ratio	1.17

Construction

Block material	cast iron
Head material	cast iron
Valvetrain	OHV
Fuel type	gas
Advertised HP	105 hp

What these numbers mean

Bore/stroke character	1.170 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM	3,313 ft/min — conservative for a street engine
Displacement per cylinder	39.2 ci
Static compression	7.5:1 — 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 (5)

• Chevrolet Advance Design trucks
• Chevrolet Task Force trucks
• Chevrolet Bel Air
• Chevrolet Impala
• GMC trucks

Similar engines

• GMC 261 — 261 ci
• GMC 230 — 230 ci
• GMC LLR — 223.9 ci
• GMC 250 — 250 ci
• GMC High Feature V6 · 3.701" × 3.370" · 10.2:1 — 217 ci
• GMC LLT — 217 ci
• Chevrolet Chevrolet 235ci · 3.563" × 3.938" · 7.5:1 — 235 ci
• Chevrolet Chevrolet 235ci · 3.563" × 3.938" · 8:1 — 235 ci

← All Chevy Straight-6 (235/261) engines