Nissan RB25 Engine Specifications
The Nissan RB25 engine is a notable inline-six engine that has garnered a reputation for its performance and reliability. It is part of the RB family of engines, which have been widely used in various Nissan models, particularly in the performance-oriented Nissan Skyline series. Below are the detailed specifications of the RB25 engine.
| Specification | Details |
|---|---|
| Engine Type | Inline-6, DOHC |
| Displacement | 2.5 liters (RB25) |
| Bore x Stroke | 86.0 mm x 73.7 mm |
| Compression Ratio | 8.6:1 (RB25DET), 9.0:1 (RB25DE) |
| Maximum Power | 250 hp (RB25DET), 190 hp (RB25DE) |
| Maximum Torque | 368 Nm (RB25DET), 245 Nm (RB25DE) |
| Fuel System | Multi-Point Fuel Injection |
| Turbocharged | Yes (RB25DET) |
| Ignition System | Distributor-less Ignition System (DIS) |
| Weight | Approximately 180 kg |
Engine Configuration
The RB25 engine is designed with a robust configuration that contributes to its performance characteristics. Below are key aspects of its configuration:
Inline-Six Design
– The RB25 features an inline-six layout, which is known for its smooth operation and balanced performance.
– This configuration allows for a longer stroke, enhancing torque delivery across a wide RPM range.
DOHC Setup
– The Double Overhead Camshaft (DOHC) design facilitates better airflow and higher RPM capabilities.
– This setup allows for precise timing of the intake and exhaust valves, improving engine efficiency.
Turbocharged Variant
– The RB25DET variant includes a turbocharger, significantly increasing power output and performance.
– The turbocharger enhances the engine’s ability to produce power without increasing engine size, making it a popular choice for tuning and performance applications.
Engine Oil Specifications & Service Intervals
Proper maintenance of the RB25 engine is crucial for longevity and performance. This includes regular oil changes and using the correct oil specifications.
Engine Oil Specifications
– Oil Type : Synthetic or Semi-Synthetic
– Viscosity : 10W-40 or 5W-30 (depending on climate and usage)
– Oil Capacity : Approximately 5.5 liters (with filter)
Service Intervals
Regular maintenance intervals are essential to keep the RB25 engine running smoothly. Here are the recommended service intervals:
- Oil Change Interval: Every 5,000 to 7,500 kilometers or every 6 months, whichever comes first.
- Oil Filter Replacement: Every oil change.
- Coolant Change: Every 2 years or 40,000 kilometers.
- Timing Belt Replacement: Every 100,000 kilometers.
- Spark Plug Replacement: Every 30,000 kilometers.
Conclusion
The Nissan RB25 engine stands out for its impressive specifications and robust configuration. With its inline-six design, DOHC setup, and turbocharged variant, it offers a blend of performance and reliability that appeals to enthusiasts and everyday drivers alike. Regular maintenance, including proper oil specifications and adherence to service intervals, ensures that the RB25 continues to deliver exceptional performance over its lifespan. Whether used in a performance vehicle or as a reliable daily driver, the RB25 engine remains a significant part of Nissan’s engineering legacy.
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