RB25

The RB25DE engine, with its 2.5-liter displacement, offers increased power potential and torque compared to the RB20DE. Of course utilizing an inline-six configuration, and incorporating a dual overhead camshaft (DOHC) setup—the engine typically generated around 180 to 190 horsepower and 160 to 170 lb-ft of torque. The RB25DE engine was produced from the mid-1990s through the early 2000s. This engine found its home in various notable Nissan vehicles, significantly enhancing their performance and reputation. Standout models included the Nissan Skyline R33 and R34 generations. These RB25DE-equipped vehicles garnered praise from enthusiasts for their exceptional performance, adept handling, and distinctive driving experiences.

Variations of the RB25 Generation from Nissan

RB25DE: a twin-cam, non-turbo configuration coupled with a 10:1 compression ratio. Such an arrangement yields a power range of 180–200 hp (134–149 kW; 182–203 PS) at 6000 rpm, with torque output at 255 N⋅m (188 lb⋅ft; 26.0 kg⋅m) at 4000 rpm.

RB25DET: a turbocharged RB25DET via a T3 Turbo and operates with an 8.5:1 compression ratio. This configuration yields an impressive power output ranging between 245–250 hp and 235 lb-ft of torque.

RB25DE NEO: Characterized by its twin-cam, non-turbo architecture, the RB25DE NEO (Nissan Ecology Oriented Variable Valve Lift and Timing) engine features a 10:1 compression ratio. It delivers power of 197 hp (147 kW; 200 PS) at 6000 rpm, along with a torque of 255 N⋅m (188 lb⋅ft; 26.0 kg⋅m) at 4000 rpm, embodying refined power delivery suitable for a range of driving scenarios.

RB25DET NEO: Representing an innovative evolution of the twin-cam, turbocharged configuration characterized by a T3 Turbo and “45V3” with OP-6 Compressor. Operating at a 9:1 compression ratio achieving a commanding power output of 276 hp at 6400 rpm. However, its impressive Torque reaches 267 lb⋅ft at 3200 rpm.