| Nissan PR engine | |
| Manufacturer: | Nissan |
| Production: | 2018present |
| Displacement: | 2.5L (2,488cc) |
| Bore: | 89mm |
| Stroke: | 100mm |
| Block: | Aluminum |
| Head: | Aluminum |
| Valvetrain: | DOHC 4 valves per cylinder with VVT |
| Timing: | Chain |
| Compression: | 12.0:1 |
| Redline: | 6200rpm |
| Fuelsystem: | Direct fuel injection |
| Fueltype: | Gasoline |
| Coolingsystem: | Water-cooled |
| Power: | NaNhp |
| Torque: | NaNlbft |
| Weight: | 142kg (313lb) |
| Emissions Level: | Euro 6, SULEV30 |
| Predecessor: | Nissan QR engine |
The PR engine is a gasoline inline-four piston engine with a displacement of 2.5L (2,488cc) that was introduced in 2018 by Nissan.[1] The motor has an aluminum block and head, and has a dual overhead camshaft (DOHC) four-valve design with variable valve timing and direct injection. The engine is heavily based on the QR engine but has 95% different parts.[2]
The engine is used in compact and midsize applications by Nissan and Mitsubishi via the Renault–Nissan–Mitsubishi Alliance.
The 2.5L (2488cc) PR25DD has a bore and stroke of NaNmm with a compression ratio of 12.0:1.[3] Compared with its predecessor, the QR25DE, it has an increased compression ratio, iron mirror-finish bore coatings instead of cast-iron cylinder liners, and a resin intake port insert to insulate charge air from heat from the cylinder head. It also has electrically actuated variable valve timing, a variable displacement oil pump, integrated exhaust manifold, and cooled EGR. These features were added to increase fuel economy and lower emissions while increasing power output.[4] [5]
It was first introduced in the Nissan Altima, where it produces 188hp at 6000rpm and 180lbft of torque at 3600rpm. It was later introduced in the 2021 Nissan Rogue and 2021 Mitsubishi Outlander, where it produces 181hp at 6000rpm and 181lbft of torque at 3600rpm.[6]
Vehicle applications: