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Nissan PR25DD specs: 2.5L (152 ci) 4-cylinder, 89 x 100 mm (3.5039 x 3.9370 in) bore and stroke, 12:1 compression. Rated 188 hp, 2019–2026.
The Nissan PR25DD is undersquare — the 3.937" stroke exceeds the 3.5039" bore by 11.0% — a layout that trades peak RPM for leverage and torque low in the range. The 3.937" stroke puts mean piston speed at 4,000 ft/min around 6,100 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).
12:1 on aluminum heads is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
It is one of 4 engines in the Nissan 152ci family, all of them 152 ci — the differences between them are in compression, heads and rating, not displacement. 8 factory variants share these dimensions, rated at 188 hp across 2019–2026.
| Displacement | 152 ci / 2.5 L |
|---|---|
| Bore | 3.5039" |
| Stroke | 3.937" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 12:1 |
| Bore/stroke ratio | 0.89 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Redline | 6,200 rpm (factory limit) |
| Advertised HP | 188 hp |
| Years | 2019–2026 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2019 | PR25DD net | 188 @ 6000 | 180 lb-ft @ 3600 | 12:1 |
| 2020 | PR25DD net | 188 @ 6000 | 180 lb-ft @ 3600 | 12:1 |
| 2021 | PR25DD net | 188 @ 6000 | 180 lb-ft @ 3600 | 12:1 |
| 2022 | PR25DD net | 188 @ 6000 | 180 lb-ft @ 3600 | 12:1 |
| 2023 | PR25DD net | 188 @ 6000 | 180 lb-ft @ 3600 | 12:1 |
| 2024 | PR25DD net | 188 @ 6000 | 180 lb-ft @ 3600 | 12:1 |
| 2025 | PR25DD net | 188 @ 6000 | 180 lb-ft @ 3600 | 12:1 |
| 2026 | PR25DD net | 188 @ 6000 | 180 lb-ft @ 3600 | 12:1 |
Factory specification sheet.
| Bore/stroke character | 0.890 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,937 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 38.0 ci |
| Static compression | 12:1 — high enough that pump premium or better is normally required |
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 |
|---|---|---|
| 2019 | 188 hp | PR25DD |
| 2020 | 188 hp | PR25DD |
| 2021 | 188 hp | PR25DD |
| 2022 | 188 hp | PR25DD |
| 2023 | 188 hp | PR25DD |
| 2024 | 188 hp | PR25DD |
| 2025 | 188 hp | PR25DD |
| 2026 | 188 hp | PR25DD |
2 factory vehicles, 2019–2026. Each year opens that model's engine table.