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Nissan VK56VD specs: 5.6L (338.8 ci) 8-cylinder, 98 x 92 mm (3.8583 x 3.6220 in) bore and stroke, 11.2:1 compression. Rated 390-400 hp, 2016–2024.
The Nissan VK56VD is oversquare — the 3.8583" bore exceeds the 3.622" stroke by 6.5% — a layout that favors airflow and RPM over leverage at the crank. The 3.622" stroke puts mean piston speed at 4,000 ft/min around 6,650 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 42.4 ci (694 cc).
11.2:1 on aluminum heads is high enough that pump premium or better is normally required.
It is one of 2 engines in the Nissan 339ci family, all of them 338.8 ci — the differences between them are in compression, heads and rating, not displacement. 9 factory variants share these dimensions, rated from 390 to 400 hp across 2016–2024.
| Displacement | 338.8 ci / 5.6 L |
|---|---|
| Bore | 3.8583" |
| Stroke | 3.622" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 11.2:1 |
| Bore/stroke ratio | 1.065 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 390–400 hp |
| Years | 2016–2024 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2016 | VK56VD net | 390 @ 5800 | 401 lb-ft @ 4000 | 11.2:1 |
| 2017 | VK56VD net | 390 @ 5800 | 394 lb-ft @ 4000 | 11.2:1 |
| 2018 | VK56VD net | 390 @ 5800 | 394 lb-ft @ 4000 | 11.2:1 |
| 2019 | VK56VD net | 390 @ 5800 | 394 lb-ft @ 4000 | 11.2:1 |
| 2020 | VK56VD net | 400 @ 5800 | 413 lb-ft @ 4000 | 11.2:1 |
| 2021 | VK56VD net | 400 @ 5800 | 413 lb-ft @ 4000 | 11.2:1 |
| 2022 | VK56VD net | 400 @ 5800 | 413 lb-ft @ 4000 | 11.2:1 |
| 2023 | VK56VD net | 400 @ 5800 | 413 lb-ft @ 4000 | 11.2:1 |
| 2024 | VK56VD net | 400 @ 5800 | 413 lb-ft @ 4000 | 11.2:1 |
Factory specification sheet.
| Bore/stroke character | 1.065 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,622 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 42.4 ci |
| Static compression | 11.2:1 — 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 |
|---|---|---|
| 2016 | 390 hp | VK56VD |
| 2017 | 390 hp | VK56VD |
| 2018 | 390 hp | VK56VD |
| 2019 | 390 hp | VK56VD |
| 2020 | 400 hp | VK56VD |
| 2021 | 400 hp | VK56VD |
| 2022 | 400 hp | VK56VD |
| 2023 | 400 hp | VK56VD |
| 2024 | 400 hp | VK56VD |
2 factory vehicles, 2016–2024. Each year opens that model's engine table.