Pontiac LA1 Specs

Pontiac LA1 engine specs: 204 ci (3.4L), 6-cylinder, 3.622" bore x 3.3071" stroke, 9.5:1 compression.

Dimensions

Displacement	204 ci / 3.4 L
Bore	3.622"
Stroke	3.3071"
Cylinders	6
Compression ratio	9.5:1
Bore/stroke ratio	1.095

Construction

Block material	cast iron
Head material	aluminum
Valvetrain	OHV
Fuel type	gas
Advertised HP	185 hp

What these numbers mean

Bore/stroke character	1.095 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM	3,307 ft/min — conservative for a street engine
Displacement per cylinder	34.0 ci
Static compression	9.5:1 — 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 (3)

• Pontiac Grand Am
• Pontiac Montana
• Pontiac Aztek

Similar engines

• Pontiac LA1 — 207 ci
• Pontiac GM 60-Degree V6 · 3.622" × 3.307" · 9.5:1 — 207 ci
• Pontiac Pontiac 207ci · 3.620" × 3.310" · 9:1 — 207 ci
• Pontiac Pontiac 207ci · 3.620" × 3.310" · 10:1 — 207 ci
• Pontiac Pontiac 207ci · 3.620" × 2.310" · 10:1 — 207 ci
• Pontiac Pontiac 213ci · 3.898" × 2.992" · 9.6:1 — 213 ci
• Hyundai G6DP — 203.9 ci
• Genesis G6DP — 204.3 ci

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