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GMC LVL specs: 110 ci (1.8L) 4-cylinder, 3.169 x 3.472 in (80.5 x 88.2 mm) bore and stroke, 10:1 compression. Rated 138 hp. DOHC. Rod ratio and piston speed.
The GMC GM Small Gasoline Engine (SGE) (LVL) is undersquare — the 3.4724" stroke exceeds the 3.1693" bore by 8.7% — a layout that trades peak RPM for leverage and torque low in the range. The 3.4724" stroke puts mean piston speed at 4,000 ft/min around 6,900 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 27.5 ci (451 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 2 engines in the GM Small Gasoline Engine (SGE) family, the largest at 110 ci. Factory fitments include the GMC Terrain, Opel Astra, Saturn Astra.
| Displacement | 110 ci / 1.8 L |
|---|---|
| Bore | 3.1693" |
| Stroke | 3.4724" |
| Cylinders | 4 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 0.913 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 138 hp |
| Bore/stroke character | 0.913 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,472 ft/min — conservative for a street engine |
| Displacement per cylinder | 27.5 ci |
| Static compression | 10:1 — in the range that usually runs on pump premium |
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