Pontiac 455 Specs
Pontiac 455 engine specs: 455 ci (7.5L), 8-cylinder, 4.1496" bore x 4.2087" stroke, 8.4:1 compression.
Dimensions
| Displacement | 455 ci / 7.5 L |
|---|
| Bore | 4.1496" |
|---|
| Stroke | 4.2087" |
|---|
| Cylinders | 8 |
|---|
| Compression ratio | 8.4:1 |
|---|
| Bore/stroke ratio | 0.986 |
|---|
Construction
| Block material | cast iron |
|---|
| Head material | cast iron |
|---|
| Valvetrain | OHV |
|---|
| Fuel type | gas |
|---|
| Advertised HP | 310–335 hp |
|---|
What these numbers mean
| Bore/stroke character | 0.986 — square — bore and stroke are within 5%, a balanced compromise |
|---|
| Mean piston speed at 6,000 RPM | 4,209 ft/min — in the range typical of performance street engines |
|---|
| Displacement per cylinder | 56.9 ci |
|---|
| Static compression | 8.4:1 — 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.
Variants sharing these dimensions (2)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|
| — | 310 hp | 455, 455 SD |
| — | 335 hp | 455 |
Vehicles (5)
- Pontiac Firebird Trans Am
- Pontiac GTO
- Pontiac Grand Ville
- Firebird Trans Am
- Formula 455
Similar engines
← All Pontiac V8 engines