Cadillac Engine Specs

Bore, stroke, displacement and compression for 25 Cadillac engines across 10 families. Free reference with rod ratio and head specs where published.

At a glance

Displacement range	121.9-500 ci
Cylinder counts	4, 6, 8
Families	10
Engines	25

Engine families

• 368 Series — 1 engine
• 390 Series — 1 engine
• 425 Series — 1 engine
• Blackwing — 4 engines
• Cadillac OHV V8 — 4 engines
• Ecotec — 2 engines
• High Feature — 1 engine
• High Feature V6 — 4 engines
• HT4100 — 3 engines
• Northstar — 4 engines

Every engine page lists bore, stroke, displacement, compression and rod ratio, with mean piston speed and bore/stroke character worked out, plus cylinder head specs where published. Each links into the calculators with its own dimensions filled in.

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