Engine Summary
- Manufacturer
- Pontiac
- Family
- Pontiac Trophy overhead-valve V8
- Displacement
- 389 cubic inches
Also Known As
1964 Standard Grand Prix Trophy V81964 Tri-Power 3891964 421 four-barrel1964 421 HO Tri-Power
Engine profile
1964 Pontiac Grand Prix Trophy V8 family
Pontiac Trophy overhead-valve V8 · 389 cubic inches · Pontiac
Identification reference
Engine Details
Source-backed component numbers, codes, stampings, and application notes.
421 HO Tri-Power
- Value
- 421 cu in; three two-barrel carburetors; up to 370 gross hp
- Application
- 1964 Grand Prix high-output option
- Type
- carburetor / specification
- Car pages
- 1964 Pontiac Grand Prix
Sources: 1964 Pontiac full-line brochure , 1964 Pontiac paint chips
421 four-barrel
- Value
- 421 cu in; application-specific output
- Application
- 1964 Grand Prix option
- Type
- engine assembly / specification
- Car pages
- 1964 Pontiac Grand Prix
Sources: 1964 Pontiac full-line brochure , 1964 Pontiac paint chips
Standard Grand Prix Trophy V8
- Value
- 389 cu in; four-barrel; 303 gross hp
- Application
- 1964 Grand Prix standard path
- Type
- engine assembly / specification
- Car pages
- 1964 Pontiac Grand Prix
Sources: 1964 Pontiac full-line brochure , 1964 Pontiac paint chips
Tri-Power 389
- Value
- 389 cu in; three two-barrel carburetors
- Application
- 1964 Grand Prix performance option
- Type
- engine assembly / specification
- Car pages
- 1964 Pontiac Grand Prix
Sources: 1964 Pontiac full-line brochure , 1964 Pontiac paint chips
Cars Using This Engine
1 linked car page.
Two-door hardtop Sports Coupe
1964 Pontiac Grand Prix
Two-door hardtop Sports Coupe