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Ford A-code specs: 460 ci (7.5L) 8-cylinder, 4.362 x 3.85 in (110.8 x 97.8 mm) bore and stroke. Rated 219-224 hp, 1972–1975. Used in the Ford Thunderbird.
The Ford A-code is oversquare — the 4.362" bore exceeds the 3.85" stroke by 13.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.85" stroke puts mean piston speed at 4,000 ft/min around 6,250 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.716 is in the range most production engines fall in. Each of the 8 cylinders displaces 57.5 ci (942 cc).
It is one of 9 engines in the Ford 460ci family, all of them 460 ci — the differences between them are in compression, heads and rating, not displacement. 3 factory variants share these dimensions, rated from 219 to 224 hp across 1972–1975.
| Displacement | 460 ci / 7.5 L |
|---|---|
| Bore | 4.362" |
| Stroke | 3.85" |
| Cylinders | 8 |
| Configuration | V8 |
| Rod length | 6.605" |
| Rod ratio | 1.716 |
| Bore/stroke ratio | 1.133 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 219–224 hp |
| Years | 1972–1975 |
| Bore/stroke character | 1.133 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,850 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.716 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 57.5 ci |
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These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1972 | 224 hp | A-code |
| 1973 | 219 hp | A-code |
| 1975 | 220 hp | A-code |