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Chevrolet LKN specs: 110 ci (1.8L) 4-cylinder, 3.169 x 3.472 in (80.5 x 88.2 mm) bore and stroke. Rated 182 hp, 2016–2019. Used in the Chevrolet Malibu. DOHC.
The Chevrolet Ecotec (LKN) 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).
It is one of 26 engines in the Ecotec family, sitting between the 61 ci and 150 ci members. 4 factory variants share these dimensions, rated at 182 hp across 2016–2019.
| Displacement | 110 ci / 1.8 L |
|---|---|
| Bore | 3.1693" |
| Stroke | 3.4724" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.913 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 182 hp |
| Years | 2016–2019 |
| 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 |
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 |
|---|---|---|
| 2016 | 182 hp | LKN |
| 2017 | 182 hp | LKN |
| 2018 | 182 hp | LKN |
| 2019 | 182 hp | LKN |
1 factory vehicle, 2016–2019. Each year opens that model's engine table.