The PR engine is a gasoline inline-four piston engine with a displacement of 2.5 L (2,488 cc) 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]
| Nissan PR engine | |
|---|---|
| Overview | |
| Manufacturer | Nissan |
| Production | 2018–present |
| Layout | |
| Displacement | 2.5 L (2,488 cc) |
| Cylinder bore | 89 mm (3.5 in) |
| Piston stroke | 100 mm (3.9 in) |
| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Valvetrain | DOHC 4 valves per cylinder with VVT |
| Valvetrain drive system | Chain |
| Compression ratio | 12.0:1 |
| RPM range | |
| Max. engine speed | 6200 rpm |
| Combustion | |
| Fuel system | Direct fuel injection |
| Fuel type | Gasoline |
| Cooling system | Water-cooled |
| Output | |
| Power output | 181–188 hp (135–140 kW; 184–191 PS) |
| Torque output | 180–181 lb⋅ft (244–245 N⋅m) |
| Dimensions | |
| Dry weight | 142 kg (313 lb) |
| Emissions | |
| Emissions target standard | Euro 6, SULEV30 |
| Chronology | |
| Predecessor | Nissan QR engine |
The engine is used in compact and midsize applications by Nissan and Mitsubishi via the Renault–Nissan–Mitsubishi Alliance.
PR25DD
editThe 2.5 L (2488 cc) PR25DD has a bore and stroke of 89 mm × 100 mm (3.5 in × 3.9 in) 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 188 hp (140 kW; 191 PS) at 6000 rpm and 180 lb⋅ft (244 N⋅m) of torque at 3600 rpm. It was later introduced in the 2021 Nissan Rogue and 2021 Mitsubishi Outlander, where it produces 181 hp (135 kW; 184 PS) at 6000 rpm and 181 lb⋅ft (245 N⋅m) of torque at 3600 rpm.[6]
Vehicle applications:
- 2019–present Nissan Altima
- 2021–2023 Nissan Rogue
- 2021–present Nissan X-trail
- 2021–present Mitsubishi Outlander
See also
editReferences
edit- ^ Guardiola, El (8 June 2022). "Engine specifications for Nissan PR25DD, characteristics, oil, performance". mymotorlist.com. Retrieved 17 October 2024.
- ^ "Nissan to use mirror bore process on new 2.5L engine for Altima; highest volume application of technique". Green Car Congress. 26 April 2019. Retrieved 17 October 2024.
- ^ "2019 Nissan Altima: Specifications". Official U.S. Newsroom. 28 March 2018. Retrieved 17 October 2024.
- ^ Capparella, Joseph (6 July 2018). "We Drove 2019 Nissan Altima Prototypes and All We Can Tell You About Are the All-New Four-Cylinder Engines". Car and Driver. Retrieved 17 October 2024.
- ^ Yoshida, Naohiro (2 April 2019). Development of New I4 2.5L Gasoline Direct Injection Engine (Report). Warrendale, PA: SAE Technical Paper.
- ^ Dorian, Drew (17 October 2024). "2021 Nissan Rogue". Car and Driver.