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Mercury 410 specs: 410 ci (6.7L) 8-cylinder, 4.051 x 3.98 in (102.9 x 101.1 mm) bore and stroke, 10.5:1 compression. Rated 330 hp. Rod ratio and piston speed.
The Mercury FE (410) is close to square: 4.0512" bore against 3.9803" stroke, within 1.8%, which splits the difference between a high-revving layout and a torque layout. The 3.9803" stroke puts mean piston speed at 4,000 ft/min around 6,050 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 51.3 ci (840 cc).
10.5:1 on iron heads is in the range that usually runs on pump premium; iron holds heat, so treat it as the less forgiving side of that range.
It is one of 34 engines in the FE family, sitting between the 332 ci and 428 ci members. Factory fitments include the Mercury Park Lane, Mercury Marquis, Mercury Cougar.
| Displacement | 410 ci / 6.7 L |
|---|---|
| Bore | 4.0512" |
| Stroke | 3.9803" |
| Cylinders | 8 |
| Compression ratio | 10.5:1 |
| Bore/stroke ratio | 1.018 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 330 hp |
| Bore/stroke character | 1.018 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,980 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 51.3 ci |
| Static compression | 10.5:1 — in the range that usually runs on pump premium |
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