We explain the difference between RB25 and RB26 in the table. RB25 VS RB26 engines are in terms of their power and performance capabilities. The old 2.5L engine has a power range of 182-203 hp at 6000 rpm and a torque of 255 Nm at 4000 rpm. rb25 vs rb26
While the latter is a much more powerful version, due to the numerous electrical, mechanical, and technical improvements incorporated in this version. The 2.6 L RB26 engine operates at an improved power capacity of 280 PS at 6,800 rpm and a torque of 353 Nm at 4000 rpm. rb25 vs rb26
Turbochargers offer improved performance to the RB26 engine model.
Comparison table between RB25 and RB26 rb25 vs rb26
| Comparison parameters | RB25 | RB26 |
| Power capacity | The RB25 engines operate at a power capacity of 182-203 PS at 6000 rpm and a torque of 255 Nm at 4000 rpm. | The RB26 engines operate at a power capacity of 280 hp at 6,800 rpm and a torque of 353 Nm at 4000 rpm. rb25 vs rb26 |
| Engine capacity | 2.5L capacity engine with a 71.7mm stroke. | 2.6L engine capacity and 73.7mm stroke. |
| Lifters | Hydraulic lifts. | Solid lifters. |
| Throttle bodies | Unique throttle body. | Six-throttle body. |
| Turbo power | No turbo (initial version) | Twin-turbocharged engine. |
| cost | Smaller than RB26 engines. | Higher than RB25 engines. |
What is RB25? rb25 vs rb26
RB25 engines were introduced by Nissan in 1993 as part of its coveted RB series specifically for the Nissan Skyline GTST R33. The RB25 engine was an improvement over its predecessor RB20DET.
This new range featured 2.5L 2498cc engines and witnessed a number of improvements that were implemented in the following years. rb25 vs rb26
The RB25DE was the initial model that was designed as a non-turbo twin cam engine with a compression ratio of 10: 1. These engines had a power capacity of 182-203 hp at 6000 rpm and a torque of 255 Nm at 4000 rpm. Thus, the new model was an improvement in the power capacity of its predecessor at a lower speed.
Two other updated versions of the RB25 were released in the following years. The upgrade for the RB25 engine was released in 1995 when Nissan announced the launch of the RB25DET Series 2 engines in this range. The upgrade featured an advanced turbocharger and electrical system.
Ignition coils were also introduced in this upgraded version of the RB25 engine. Finally, in 1998 the RB25DET NEO was introduced with more specific revisions for the Nissan Skyline R34. This version was marketed as a low-emission engine that significantly reduced fuel consumption.
What is RB26?
RB26 engines were in wide circulation from 1998-2002. The RB26DETT line featured 2.6L inline-six engines. They were used primarily in the Nissan Skyline GT-R. The single throttle body used in its predecessors was replaced by six individual throttle bodies on this new model.
The RB26 DETT engine often has the right to be the king of the engines in the Nissan RB engine range. By implementing T-25 ceramic turbochargers, the engine has a turbo system.
The highest post-production power level recorded was 280 hp at 6800 rpm and torque of 353 Nm at 4000 rpm. This is a notable improvement over the power capacity of its predecessor.
Other features of this line of engines include belt-driven cams, sodium-charged exhaust valves, and solids-lifter valves. This famous line of engines was modified with the launch of the RB26 DETT N1 which further enhanced this powerful engine design. Recently, Nissan announced its decision to resume production of the RB26 engines. rb25 vs rb26
Main differences between RB25 and RB26
- The main difference between RB25 and RB26 is in the power capacity of each engine version. The former has a capacity of 182-203 PS at 6000 rpm and a torque of 255 Nm at 4000 rpm. While the latter works at a capacity of 280 hp at 6,800 rpm and a torque of 353 Nm at 4000 rpm.
- The older version increases a 2.5-liter engine capacity with a 71.7mm stroke. The latter is powered by a 2.6L engine with a 73.7mm stroke. This makes the RB26 version more powerful than the RB25 model. rb25 vs rb26
- Another difference can be noticed in terms of the elevators that each version presents. While the RB25 engines work with hydraulic lifters, the upgraded RB26 version uses solid lifters.
- The RB25 engines used a single throttle body, while its successor, the RB26, operates on 6 throttle bodies.
- The initial RB25 model was a non-turbo engine, although turbochargers were added in later updated versions. The RB26 works with a Biturbo system that makes them much more efficient and powerful than its predecessor RB25.
- The comparative cost of the RB25 model is lower than that of the RB26 version. Additional updates make the RB26 more expensive than its predecessor.
Final Thought
The famous Nissan Skyline engine models were widely appreciated by car enthusiasts around the world for their low fuel consumption, top-of-the-line features, and superior quality. However, there are subtle differences between each version released by the brand. rb25 vs rb26
The RB25 engines were a class apart from their predecessors both in terms of power and construction. This design was further improved in updates implemented in subsequent years. However, the RB26 model revolutionized the motor market.
Turbochargers boosted improved power capacity, solid lifters, improved electrical mechanics, 6 throttle bodies, and other improved features making this engine significantly different from the RB25 version. rb25 vs rb26
The non-turbo RB25 version was different from this model in several respects, including lower power capacity, hydraulic lifters, and a single-throttle body.
The RB26 engine was priced higher than the RB25 models, due to electrical and compound upgrades. Although both are powerful and efficient models, the RB26 is the most optimized option.
