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Dodge 1954 241 150HP specs: 241 ci (4.0L) 8-cylinder, 3.438 x 3.25 in (87.3 x 82.6 mm) bore and stroke, 7.5:1 compression. Rated 150 hp, 1954.
The Dodge 1954 241 150HP is oversquare — the 3.4375" bore exceeds the 3.25" stroke by 5.8% — a layout that favors airflow and RPM over leverage at the crank. The 3.25" stroke does not reach 4,000 ft/min of mean piston speed until about 7,400 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 30.1 ci (494 cc).
7.5:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 2 engines in the Dodge 241ci family, all of them 241 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 241 ci / 4 L |
|---|---|
| Bore | 3.4375" |
| Stroke | 3.25" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 7.5:1 |
| Bore/stroke ratio | 1.058 |
| Valvetrain | OHV |
|---|---|
| Induction | 2-bbl |
| Fuel type | gas |
| Advertised HP | 150 hp |
| Years | 1954 |
| Bore/stroke character | 1.058 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,250 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.1 ci |
| Static compression | 7.5:1 — low by modern standards, generally happy on regular pump fuel |
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