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Nissan VQ38DD specs: 3.8L (232 ci) 6-cylinder, 95.5 x 88.4 mm (3.7598 x 3.4803 in) bore and stroke, 11:1 compression. Rated 310 hp, 2020–2026.
The Nissan VQ38DD is oversquare — the 3.7598" bore exceeds the 3.4803" stroke by 8.0% — a layout that favors airflow and RPM over leverage at the crank. The 3.4803" 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 6 cylinders displaces 38.7 ci (634 cc).
11:1 is high enough that pump premium or better is normally required.
7 factory variants share these dimensions, rated at 310 hp across 2020–2026.
| Displacement | 232 ci / 3.8 L |
|---|---|
| Bore | 3.7598" * |
| Stroke | 3.4803" * |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 11:1 |
| Bore/stroke ratio | 1.08 |
* Bore and stroke from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Redline | 6,600 rpm (factory limit) |
| Advertised HP | 310 hp |
| Years | 2020–2026 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2020 | VQ38DD net | 310 @ 6400 | 281 lb-ft @ 4400 | 11:1 |
| 2021 | VQ38DD net | 310 @ 6400 | 281 lb-ft @ 4400 | 11:1 |
| 2022 | VQ38DD net | 310 @ 6400 | 281 lb-ft @ 4400 | 11:1 |
| 2023 | VQ38DD net | 310 @ 6400 | 281 lb-ft @ 4400 | 11:1 |
| 2024 | VQ38DD net | 310 @ 6400 | 281 lb-ft @ 4400 | 11:1 |
| 2025 | VQ38DD net | 310 @ 6400 | 281 lb-ft @ 4400 | 11:1 |
| 2026 | VQ38DD net | 310 @ 6400 | 281 lb-ft @ 4400 | 11:1 |
Factory specification sheet.
| Bore/stroke character | 1.080 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,480 ft/min — conservative for a street engine |
| Displacement per cylinder | 38.7 ci |
| Static compression | 11:1 — 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 |
|---|---|---|
| 2020 | 310 hp | VQ38DD |
| 2021 | 310 hp | VQ38DD |
| 2022 | 310 hp | VQ38DD |
| 2023 | 310 hp | VQ38DD |
| 2024 | 310 hp | VQ38DD |
| 2025 | 310 hp | VQ38DD |
| 2026 | 310 hp | VQ38DD |
1 factory vehicle, 2020–2026. Each year opens that model's engine table.