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Saturn LX9 specs: 213 ci (3.5L) 6-cylinder, 3.658 x 3.386 in (92.9 x 86 mm) bore and stroke, 9.8:1 compression. Rated 200 hp. OHV. Rod ratio and piston speed.
The Saturn GM High Value (LX9) is oversquare — the 3.6575" bore exceeds the 3.3858" stroke by 8.0% — a layout that favors airflow and RPM over leverage at the crank. The 3.3858" stroke does not reach 4,000 ft/min of mean piston speed until about 7,100 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 35.5 ci (582 cc).
9.8:1 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 2 engines in the GM High Value family, the smallest at 213 ci. Factory fitments include the Saturn Vue, Saturn Relay.
| Displacement | 213 ci / 3.5 L |
|---|---|
| Bore | 3.6575" |
| Stroke | 3.3858" |
| Cylinders | 6 |
| Compression ratio | 9.8:1 |
| Bore/stroke ratio | 1.08 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 200 hp |
| Bore/stroke character | 1.080 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,386 ft/min — conservative for a street engine |
| Displacement per cylinder | 35.5 ci |
| Static compression | 9.8:1 — in the range that usually runs on pump premium |
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