Nissan PR engine

Nissan PR engine
Overview
ManufacturerNissan
Production2018–present
Layout
Displacement2.5 L (2,488 cc)
Cylinder bore89 mm (3.5 in)
Piston stroke100 mm (3.9 in)
Cylinder block materialAluminum
Cylinder head materialAluminum
ValvetrainDOHC 4 valves per cylinder with VVT
Valvetrain drive systemChain
Compression ratio12.0:1
RPM range
Max. engine speed6200 rpm
Combustion
Fuel systemDirect fuel injection
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output181–188 hp (135–140 kW; 184–191 PS)
Torque output180–181 lb⋅ft (244–245 N⋅m)
Dimensions
Dry weight142 kg (313 lb)
Emissions
Emissions target standardEuro 6, SULEV30
Chronology
PredecessorNissan QR engine

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]

The engine is used in compact and midsize applications by Nissan and Mitsubishi via the Renault–Nissan–Mitsubishi Alliance.

PR25DD

The 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:

See also

References

  1. ^ Guardiola, El (8 June 2022). "Engine specifications for Nissan PR25DD, characteristics, oil, performance". mymotorlist.com. Retrieved 17 October 2024.
  2. ^ "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.
  3. ^ "2019 Nissan Altima: Specifications". Official U.S. Newsroom. 28 March 2018. Retrieved 17 October 2024.
  4. ^ 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.
  5. ^ Yoshida, Naohiro (2 April 2019). Development of New I4 2.5L Gasoline Direct Injection Engine (Report). Warrendale, PA: SAE Technical Paper.
  6. ^ Dorian, Drew (17 October 2024). "2021 Nissan Rogue". Car and Driver.