Nissan QR engine

The QR family of inline-four piston engines by Nissan were introduced in 2000 and range from 1998 to 2488 cc in displacement. These motors are aluminum, dual overhead camshaft (DOHC), four-valve designs with variable valve timing and optional direct injection. The engine shares much of its architecture with the YD diesel engine.

QR20DE


The 1998 cc QR20DE produces 140 PS at 6000 rpm and 200 Nm at 4000 rpm. The bore and stroke is 89x80.3 mm and a compression ratio of 9.9:1. The QR20DE was replaced with the MR20DE engine in most applications in early 2005.

Vehicle applications:
 * 2001-2007 Nissan X-Trail T30, 140 PS
 * 2001-2007 Nissan Primera P12
 * 2002–present Nissan Serena C24, 145 PS
 * 2003-2008 Nissan Teana J31, 145 PS
 * 2001-2005 Nissan Wingroad Y11
 * 2002-2005 Nissan Avenir W11
 * 2001-2004 Nissan Prairie M12
 * 2007-2020 Nissan Atlas F24
 * 2014-present Nissan Urvan E26

QR20DD
The QR20DD is similar to the QR20DE but features NEO direct injection to improve fuel economy and to reduce emissions. It produces 150 PS at 6000 rpm and 200 Nm at 4400 rpm.

Vehicle applications:
 * 2000-2004 Nissan Bluebird Sylphy

QR25DE
The QR25DE is a 2488 cc variant built with cast steel connecting rods, a steel timing chain, counter-rotating balance shafts, and an aluminum intake manifold. The engine bore and stroke is 89x100 mm and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.

Output is rated 175 hp at 6000 rpm with 244 Nm of torque at 4000 rpm in the Altima 2.5 and Sentra SE-R models. The Sentra SE-R Spec V originally claimed 180 hp, but this was adjusted downward to 175 once production started in late 2001. The redline is 6100 rpm. Altimas that are PZEV compliant create 170 hp and 175 lbft of torque. In the 2005+ Nissan Frontier the QR25DE generates 152 hp and 171 lbft of torque.

2007+ QR25DE
The revised QR25DE found in the 2007+ Sentra, Altima, Rogue, etc. has a number of improvements over the older QR25DE. These include:
 * A simpler, larger diameter single path resin intake manifold replaced the old dual path design. (Note: California emissions models do have a swirl control valve located in the intake)
 * Revised piston crown shape to support a higher compression ratio of 9.6:1.(10.5:1 in Sentra SE-R Spec V.)
 * The balancer system has been moved back slightly from the crank pulley to a more centric location in the block.
 * Revised cam shaft profile.
 * Reinforced connecting rods only available in the Sentra SE-R Spec V 2007-2012.
 * Reduced friction likely through Nissan's extensive use of coatings on pistons, journal bearings, etc.
 * Additional engine mount on the top of the motor, pulley side.
 * Higher rev limit and improved power output.


 * 1999–2003 Nissan Bassara- 165 hp
 * 2001–2005 Nissan Serena C24- 158 hp
 * 2001–2007 Nissan X-Trail T30 APEC export version- 178 hp
 * 2002–2006 Nissan Sentra SE-R- 165 hp & SE-R Spec V- 175 hp
 * 2002–2009 Nissan Presage- 165 hp
 * 2002–2020 Nissan Altima 170 hp to 182 hp
 * 2003–2005 Nissan Teana- 160 hp
 * 2003–present Nissan Murano (Japan)
 * 2005–2019 Nissan Frontier- 152 hp
 * 2007–2012 Nissan Sentra SE-R- 177 hp & SE-R Spec V- 200 hp
 * 2007–2011 Nissan Altima Hybrid 158 hp, combined 198 hp
 * 2007–present Nissan X-Trail T31- 169 hp
 * 2007–present Renault Koleos TR25- 169 hp
 * 2008–2020 Nissan Rogue- 170 hp
 * 2009–2012 Suzuki Equator- 152 hp
 * 2010–present Nissan Elgrand E52
 * 2013–present Nissan Teana- 165 hp
 * 2013–present Nissan X-Trail T32- 169 hp
 * 2014-present Nissan Urvan E26
 * 2018–present Nissan Terra- 180 hp165 hp
 * 2020–present Nissan X-Terra-

QR25DD
The QR25DD is similar to the QR25DE but increases the compression ratio to 10.5:1 and includes direct injection. This engine is also the first QR to use DLC coating on the valve lifter buckets for reduced friction. It produces 125 kW at 5600 rpm and 245 Nm at 4000 rpm.

Vehicle applications:
 * 2002-2006 Nissan Primera P12 (JDM)

QR25DER
The QR25DER is similar to the QR25DE but has a supercharger for increased power and is coupled with a 15 kW electric motor, Dual Clutch System, and lithium-ion battery for increased fuel efficiency. The engine has a compression ratio of 9.1:1 (10.0:1 in 2014 Infiniti QX70 ) and produces a combined 250 hp at 5600 rpm and 243 lbft at 3600 rpm.

Vehicle applications:
 * 2014 - 2015 Nissan Pathfinder Hybrid
 * 2016 only Nissan Murano Hybrid
 * 2014 - 2017 Infiniti QX60 Hybrid

General references

 * "2007 Nissan Altima overview"
 * "2007 Nissan Altima specifications"
 * "2006 Nissan Frontier specifications
 * "2006 Nissan Sentra specifications"
 * "NTB03070 Nissan technical service bulletin regarding engine precatalyst failure"
 * "NTB06045 Nissan technical service bulletin regarding low oil levels"
 * "NTB05058 Nissan technical service bulletin regarding power valve screws"
 * "Technobabble: December 2001 by Dave Coleman, "SportCompactCar", December 2001, retrieved June 26, 2006