See other engines in this family
Chevrolet 226ci (1961–1964) specs: 226 ci 6-cylinder, 3.313 x 4.375 in (84.1 x 111.1 mm) bore and stroke. Rated 80-141 hp, 1961–1964.
The Chevrolet 226ci (1961–1964) is undersquare — the 4.375" stroke exceeds the 3.3125" bore by 24.3% — a layout that trades peak RPM for leverage and torque low in the range. With a 4.375" stroke, mean piston speed reaches 4,000 ft/min at only 5,500 RPM — the practical ceiling for a production bottom end — which is why a stroke this long makes its power low and runs out of safe revs early. Each of the 6 cylinders displaces 37.7 ci (617 cc).
6 factory variants share these dimensions, rated from 80 to 141 hp across 1961–1964.
| Displacement | 226 ci |
|---|---|
| Bore | 3.3125" |
| Stroke | 4.375" |
| Cylinders | 6 |
| Configuration | I6 |
| Bore/stroke ratio | 0.757 |
| Fuel type | gas |
|---|---|
| Advertised HP | 80–141 hp |
| Years | 1961–1964 |
| Bore/stroke character | 0.757 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 4,375 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 37.7 ci |
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 |
|---|---|---|
| 1961 | 80 hp | — |
| 1962 | 80 hp | — |
| 1963 | 80 hp | — |
| 1963 | 141 hp | — |
| 1964 | 80 hp | — |
| 1964 | 141 hp | — |
1 factory vehicle, 1961–1964. Each year opens that model's engine table.