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Hudson 262ci (1948–1953) specs: 262 ci 6-cylinder, 3.563 x 4.375 in (90.5 x 111.1 mm) bore and stroke. Rated 121-127 hp, 1948–1953. Used in the Hudson Hudson.
The Hudson 262ci (1948–1953) is undersquare — the 4.375" stroke exceeds the 3.5625" bore by 18.6% — 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 43.7 ci (716 cc).
6 factory variants share these dimensions, rated from 121 to 127 hp across 1948–1953.
| Displacement | 262 ci |
|---|---|
| Bore | 3.5625" |
| Stroke | 4.375" |
| Cylinders | 6 |
| Configuration | I6 |
| Compression ratio | 6.5–6.7:1 (published figures vary) |
| Bore/stroke ratio | 0.814 |
| Fuel type | gas |
|---|---|
| Advertised HP | 121–127 hp |
| Years | 1948–1953 |
| Bore/stroke character | 0.814 — 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 | 43.7 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 |
|---|---|---|
| 1948 | 121 hp | — |
| 1949 | 121 hp | — |
| 1950 | 123 hp | — |
| 1951 | 123 hp | — |
| 1952 | 127 hp | — |
| 1953 | — | — |
1 factory vehicle, 1948–1953. Each year opens that model's engine table.