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Mercury 3.0L V6 specs: 182 ci (3.0L) 6-cylinder, 3.50 x 3.201 in (88.9 x 81.3 mm) bore and stroke, 10:1 compression. Rated 200 hp. Rod ratio and piston speed.
The Mercury 3.0L V6 is oversquare — the 3.5" bore exceeds the 3.2008" stroke by 9.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.2008" stroke does not reach 4,000 ft/min of mean piston speed until about 7,500 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 30.3 ci (497 cc).
10:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 12 engines in the Duratec family, sitting between the 140 ci and 227 ci members. Factory fitments include the Mercury Sable, Mercury Milan, Mercury Mariner.
| Displacement | 182 ci / 3 L |
|---|---|
| Bore | 3.5" |
| Stroke | 3.2008" |
| Cylinders | 6 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 1.093 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 200 hp |
| Bore/stroke character | 1.093 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,201 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.3 ci |
| Static compression | 10:1 — in the range that usually runs on pump premium |
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