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Chevrolet 165ci (2023) specs: 165 ci (2.7L) 4-cylinder, 3.632 x 4.016 in (92.3 x 102 mm) bore and stroke, 10:1 compression. Rated 310 hp, 2023.
The Chevrolet 165ci (2023) is undersquare — the 4.0157" stroke exceeds the 3.6319" bore by 9.6% — a layout that trades peak RPM for leverage and torque low in the range. The 4.0157" stroke puts mean piston speed at 4,000 ft/min around 6,000 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 41.3 ci (676 cc).
10:1 is in the range that usually runs on pump premium.
It is one of 2 engines in the Chevrolet 165ci family, all of them 165 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 165 ci / 2.7 L |
|---|---|
| Bore | 3.6319" |
| Stroke | 4.0157" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 0.904 |
| Fuel type | gas |
|---|---|
| Advertised HP | 310 hp |
| Years | 2023 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2023 | net | 310 @ 5600 * | 430 lb-ft @ 3000 * | — |
Factory specification sheet. * Not yet cross-verified.
| Bore/stroke character | 0.904 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 4,016 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 41.3 ci |
| Static compression | 10:1 — in the range that usually runs on pump premium |
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1 factory vehicle, 2023. Each year opens that model's engine table.