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Chevrolet 283ci specs: 283 ci (4.6L) 8-cylinder, 3.875 x 3.00 in (98.4 x 76.2 mm) bore and stroke, 9.25:1 compression. Rated 195-220 hp, 1964–1967.
The Chevrolet 283ci is oversquare — the 3.875" bore exceeds the 3" stroke by 29.2% — a layout that favors airflow and RPM over leverage at the crank. The 3" stroke does not reach 4,000 ft/min of mean piston speed until about 8,000 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. A rod ratio of 1.9 is long by production standards — less side-load on the cylinder wall and gentler piston acceleration around TDC, the geometry that tolerates high RPM. Each of the 8 cylinders displaces 35.4 ci (580 cc).
9.25:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 25 engines in the Chevrolet 283ci family, all of them 283 ci — the differences between them are in compression, heads and rating, not displacement. 6 factory variants share these dimensions, rated from 195 to 220 hp across 1964–1967.
| Displacement | 283 ci / 4.6 L |
|---|---|
| Bore | 3.875" |
| Stroke | 3" |
| Cylinders | 8 |
| Compression ratio | 9.25:1 |
| Rod length | 5.7" |
| Rod ratio | 1.9 |
| Bore/stroke ratio | 1.292 |
| Piston deck clearance | 0.014" |
| Induction | 1-4 |
|---|---|
| Advertised HP | 195–220 hp |
| Years | 1964–1967 |
| Bore/stroke character | 1.292 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,000 ft/min — conservative for a street engine |
| Rod ratio | 1.9 — long — less side loading on the cylinder wall, favours high RPM |
| Displacement per cylinder | 35.4 ci |
| Static compression | 9.25:1 — low by modern standards, generally happy on regular pump fuel |
| Intake valve diameter | 1.725" |
|---|---|
| Exhaust valve diameter | 1.505" |
| Chamber volume | 54.9 cc |
| Rocker ratio | 1.5:1 |
| Lifter type | hydraulic |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1964 | 220 hp | — |
| 1965 | 195 hp | — |
| 1965 | 220 hp | — |
| 1966 | 195 hp | — |
| 1966 | 220 hp | — |
| 1967 | 195 hp | — |