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| Nissan VK | |
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| Overview | |
| Manufacturer | Nissan (Nissan Machinery) |
| Production | 2002–present |
| Layout | |
| Configuration | 90° V8 |
| Displacement | 4.5 L; 274.2 cu in (4,494 cc) 5.0 L; 306.7 cu in (5,026 cc) 5.6 L; 338.8 cu in (5,552 cc) |
| Cylinder bore | 93 mm (3.66 in) 95.5 mm (3.76 in) 98 mm (3.86 in) |
| Piston stroke | 82.7 mm (3.26 in) 87.7 mm (3.45 in) 92 mm (3.62 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC 4 valves x cyl. with CVTCS and VVEL (some versions) |
| Compression ratio | 11.0:1, 10.9:1 |
| Combustion | |
| Fuel system | SFI, GDI |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
| Power output | 305–650 hp (227.4–484.7 kW) |
| Torque output | 385–485 lb⋅ft (522.0–657.6 N⋅m) |
| Chronology | |
| Predecessor | Nissan VH |
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The VK engine (formerly known as the ZH) is a V8 piston engine from Nissan. It is an aluminum DOHC 4-valve design.
The VK engine was originally based on Nissan's VQ V6 rather than the VH V8 used in previous Q45/Cima models. Changes include: a variable intake manifold, newly designed heads, and a larger drive by wire throttle chamber. The intake manifold directs air through different paths at different engine speeds to optimise low-end torque or high-end horsepower.