See other engines in this family
Buick LK0 specs: 152 ci (2.5L) 4-cylinder, 3.46 x 4.04 in (87.9 x 102.6 mm) bore and stroke. Rated 328 hp, 2025–2026. Used in the Chevrolet Traverse.
The Buick 152ci (LK0) is undersquare — the 4.04" stroke exceeds the 3.46" bore by 14.4% — a layout that trades peak RPM for leverage and torque low in the range. The 4.04" stroke puts mean piston speed at 4,000 ft/min around 5,950 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 38.0 ci (623 cc).
2 factory variants share these dimensions, rated at 328 hp across 2025–2026.
| Displacement | 152 ci / 2.5 L |
|---|---|
| Bore | 3.46" * |
| Stroke | 4.04" * |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.856 |
* Bore and stroke from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 328 hp |
| Years | 2025–2026 |
| Bore/stroke character | 0.856 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 4,040 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 38.0 ci |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2025 | 328 hp | LK0 |
| 2026 | 328 hp | LK0 |
3 factory vehicles, 2024–2026. Each year opens that model's engine table.