Editing Nissan QR engine

{{Insufficient inline citations|date=March 2019}}{{Infobox automobile engine
| name = Nissan QR engine
| image = Nissan QR25DE Engine.JPG
| caption = A Nissan QR25DE Engine
| manufacturer = [[Nissan]] ([[Nissan Machinery]])
| production = 2000&ndash;present
| configuration = [[Inline-four engine|Inline-four]]
| valvetrain = [[DOHC]] [[Multi-valve#Four valves|4 valves x cyl.]] with [[Variable valve timing|VVT]]
| block = Aluminum
| head = Aluminum
| predecessor = [[Nissan SR engine]]<br>[[Nissan KA engine]]
| fueltype = [[Petrol engine|Gasoline]]
| fuelsystem = [[Fuel Injection|Port Fuel Injection]] or [[Gasoline Direct Injection|Direct Fuel Injection]]
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| displacement = {{cvt|1998|cc|L|1|disp=flip}}<br />{{cvt|2488|cc|L|1|disp=flip}}
| bore = {{convert|89|mm|abbr=on}}
| stroke = {{convert|80.3|mm|2|abbr=on}}<br/>{{convert|100|mm|2|abbr=on}}
| compression = 9.1:1-10.5:1
| power = {{cvt|140-253|PS|kW PS hp|0|order=out}}
| torque = {{cvt|200-330|Nm|lbft|0}}
| supercharger = On QR25DER only
}}

The '''QR''' family of [[Straight-four engine|inline-four]] [[piston engine]]s by Nissan were introduced in 2000 and range from {{convert|1998|to|2488|cc|L|1|abbr=on|disp=flip}} in displacement. These motors are aluminum, dual overhead camshaft ([[DOHC]]), four-valve designs with [[variable valve timing]] and optional [[fuel injection#Direct injection systems|direct injection]]. The engine shares much of its architecture with the [[Nissan YD engine|YD diesel engine]].

==QR20DE==
[[file:Nissan QR20DE Motor.JPG|thumb|QR20DE]]

The {{convert|1998|cc|L|1|abbr=on|disp=flip}} '''QR20DE''' produces {{convert|140|PS|kW hp|0|abbr=on}} at 6000&nbsp;rpm and {{convert|200|Nm|lbft|0|abbr=on}} at 4000&nbsp;rpm. The bore and stroke is {{convert|89x80.3|mm|2|abbr=on}} and a [[compression ratio]] of 9.9:1.<ref name=SAE01>{{cite web | url = http://www.sae.org/automag/globalvehicles/06-2001/ | archiveurl = https://web.archive.org/web/20040625144514/http://www.sae.org/automag/globalvehicles/06-2001/ | archivedate = 2004-06-25 | title = Two midsize Nissans for Japan and Europe | first = Jack | last = Yamaguchi | publisher = SAE International }}</ref> The QR20DE was replaced with the [[Nissan MR engine#MR20DE (Renault M4R)|MR20DE]] engine in most applications in early 2005.

Vehicle applications:
* 2001-2007 [[Nissan X-Trail]] T30, {{cvt|140|PS|kW|0}}
* 2001-2007 [[Nissan Primera]]  P12
* 2002–present [[Nissan Serena]] C24, {{cvt|145|PS|kW|0}}
* 2003-2008 [[Nissan Teana]] J31, {{cvt|145|PS|kW|0}}
* 2001-2005 [[Nissan Wingroad]] Y11
* 2002-2005 [[Nissan Avenir]] W11
* 2001-2004 [[Nissan Prairie]] M12
* 2007-2020 [[Nissan Atlas#F24|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 in automobiles|fuel economy]] and to reduce emissions.[https://web.archive.org/web/20060114194812/http://www.nissan-global.com/GCC/Japan/NEWS/20000727_0e.html] It produces {{convert|150|PS|kW hp|0|abbr=on}} at 6000&nbsp;rpm and {{convert|200|Nm|lbft|0|abbr=on}} at 4400&nbsp;rpm.<ref name="SAE01"/>

Vehicle applications:
* 2000-2004 [[Nissan Bluebird Sylphy]]

==QR25DE==
[[Image:2001 Nissan QR25DE engine left.jpg|thumb|Nissan QR25DE Engine]]
The '''QR25DE''' is a {{convert|2488|cc|L|1|abbr=on|disp=flip}} variant built with cast steel connecting rods, a steel timing chain, counter-rotating [[balance shaft]]s, and an aluminum intake manifold. The engine bore and stroke is {{convert|89x100|mm|2|abbr=on}} and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.<ref>{{cite web | url = http://www.nissannews.com/nissan/2006vehicles/altima/specs.shtml | archive-url = https://web.archive.org/web/20061213081514/http://www.nissannews.com/nissan/2006vehicles/altima/specs.shtml | archive-date = 2006-12-13 | work = NissanNewS | title = 2006 Altima Specifications | publisher = Nissan North America }}</ref>

Output is rated {{cvt|175|hp|kW PS|0}} at 6000&nbsp;rpm with {{convert|244|Nm|lbft|0|abbr=on}} of torque at 4000&nbsp;rpm in the [[Nissan Altima|Altima]] 2.5 and [[Nissan Sentra|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.<ref name=Jacquot2001>{{cite magazine | url = http://www.sportcompactcarweb.com/roadtests/0112scc_2002_nissan_sentra_se_r/ | archive-url = https://web.archive.org/web/20061229174710/www.sportcompactcarweb.com/roadtests/0112scc_2002_nissan_sentra_se_r/ | archive-date = 2006-12-29 | title = Road Tests: 2002 Nissan Sentra SE-R Spec V: Round Two. Ding | first = Josh | last = Jacquot | magazine = SportCompactCar | date = December 2001 | publisher = Primedia }}</ref> The redline is 6100&nbsp;rpm.<ref name=Jacquot2001/> Altimas that are [[PZEV]] compliant create {{convert|170|hp|kW PS|0|abbr=on}} and {{convert|175|lbft|Nm|0|abbr=on}} of torque.[http://www.nissannews.com/nissan/2006vehicles/sentra/specs.shtml] In the 2005+ [[Nissan Frontier]] the QR25DE generates {{convert|152|hp|kW PS|0|abbr=on}} and {{convert|171|lbft|Nm|0|abbr=on}} of torque.[http://www.nissannews.com/nissan/2006vehicles/frontier/specs.shtml]

===2007+ QR25DE===
The revised QR25DE found in the 2007+ Sentra, Altima, [[Nissan Rogue|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.

{{hidden begin|title=Vehicle applications:|titlestyle=background:#88FF88; text-align:left;|bodystyle=text-align:left;}}
* 1999–2003 [[Nissan Bassara]] {{Convert|165|hp|kW PS|0|abbr=on}}
* 2001–2005 [[Nissan Serena]] C24 {{Convert|158|hp|kW PS|0|abbr=on}}
* 2001–2007 [[Nissan X-Trail]] T30 APEC export version {{Convert|178|hp|kW PS|0|abbr=on}}
* 2002–2006 [[Nissan Sentra]] SE-R {{Convert|165|hp|kW PS|0|abbr=on}} & [[SE-R Spec V#SE-R Spec V|SE-R Spec V]] {{Convert|175|hp|kW PS|0|abbr=on}}
* 2002–2009 [[Nissan Presage]] {{Convert|165|hp|kW PS|0|abbr=on}}
* 2002–2020 [[Nissan Altima]] {{Convert|170|hp|kW PS|0|abbr=on}} to {{Convert|182|hp|kW PS|0|abbr=on}}
* 2003–2005 [[Nissan Teana]] {{Convert|160|hp|kW PS|0|abbr=on}}
* 2003–2014 [[Nissan Murano]] (Japan)
* 2005–2019 [[Nissan Frontier]] {{Convert|152|hp|kW PS|0|abbr=on}}
* 2007–2012 [[Nissan Sentra]] SE-R {{Convert|177|hp|kW PS|0|abbr=on}} & [[SE-R Spec V#SE-R Spec V|SE-R Spec V]] {{Convert|200|hp|kW PS|0|abbr=on}}
* 2007–2011 [[Nissan Altima]] Hybrid {{Convert|158|hp|kW PS|0|abbr=on}}, combined {{Convert|198|hp|kW PS|0|abbr=on}}
* 2007–2020 [[Nissan X-Trail]] T31 {{Convert|169|hp|kW PS|0|abbr=on}}
* 2007–2023 [[Renault Koleos]] TR25 {{Convert|169|hp|kW PS|0|abbr=on}}
* 2008–2020 [[Nissan Rogue]] {{Convert|170|hp|kW PS|0|abbr=on}}
* 2009–2012 [[Suzuki Equator]] {{Convert|152|hp|kW PS|0|abbr=on}}
* 2010–present [[Nissan Elgrand#E52|Nissan Elgrand E52]]
* 2013–2020 [[Nissan Teana]] {{Convert|165|hp|kW PS|0|abbr=on}}
* 2013–present [[Nissan X-Trail]] T32 {{Convert|169|hp|kW PS|0|abbr=on}}
* 2014-present [[Nissan Urvan]] E26
* 2018–present [[Nissan Terra]]- {{Convert|180|hp|kW PS|0|abbr=on}}{{Convert|165|hp|kW PS|0|abbr=on}}
* 2020–present [[Nissan Terra|Nissan X-Terra]]- 
{{hidden end}}

==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 [[Diamond-like carbon|DLC]] coating on the [[valve lifter]] buckets for reduced friction. It produces {{convert|125|kW|PS hp|0|abbr=on}} at 5600&nbsp;rpm and {{convert|245|Nm|lbft|0|abbr=on}} at 4000&nbsp;rpm.<ref name="SAE01"/>

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 {{convert|15|kW|abbr=on}} 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<ref>{{citation | title = Infiniti QX70 | type = Electronic Service Manual | page = EM-154 | date = 2014 | publisher = Nissan North America }}</ref>) and produces a combined {{cvt|250|hp|kW PS|0}} at 5600&nbsp;rpm and {{convert|243|lbft|Nm|0|abbr=on}} at 3600&nbsp;rpm.<ref>{{cite web |url=http://nissannews.com/en-CA/nissan/canada/presskits/ca-2014-nissan-pathfinder-hybrid/releases/2014-nissan-pathfinder-hybrid-key-dimensions-and-specifications-2 |url-status=dead |archive-url=https://web.archive.org/web/20140426235939/http://nissannews.com/en-CA/nissan/canada/presskits/ca-2014-nissan-pathfinder-hybrid/releases/2014-nissan-pathfinder-hybrid-key-dimensions-and-specifications-2 |archive-date=2014-04-26 |title= 2014 Nissan Pathfinder Hybrid Specifications | work = Nissan Online Newsroom | publisher = Nissan Canada }}</ref>

Vehicle applications:
* 2014 - 2015 [[Nissan Pathfinder#Fourth generation R52 series (2013-Present)|Nissan Pathfinder Hybrid]]
* 2016 only [[Nissan Murano#Third generation (Z52; 2014)|Nissan Murano Hybrid]]
* 2014 - 2017 [[Infiniti QX60]] Hybrid

==See also==
* [[List of Nissan engines]]

==References==
{{unclear style|date=August 2020}}
{{Reflist}}

===General references===
* [http://www.nissannews.com/nissan/2007vehicles/altima/overview.shtml "2007 Nissan Altima overview"]
* [https://web.archive.org/web/20100409075442/http://www.nissannews.com/nissan/2007vehicles/altima/specs.shtml "2007 Nissan Altima specifications"]
* [http://www.nissannews.com/nissan/2006vehicles/frontier/specs.shtml "2006 Nissan Frontier specifications]
* [http://www.nissannews.com/nissan/2006vehicles/sentra/specs.shtml "2006 Nissan Sentra specifications"]
* [http://www.nissan-techinfo.com/nissan/TSB/TSB_xml/nmabstract.asp?mscssid=&VdocID=54354&phydoc=Y&FileName=1\R\F\1RF28.PDF&VRefNo=NTB03070 "NTB03070 Nissan technical service bulletin regarding engine precatalyst failure"]
* [http://www.nissanhelp.com/Ownership/Bulletins/Nissan/2006/NTB06-045.htm "NTB06045 Nissan technical service bulletin regarding low oil levels"]
* [http://www.nissan-techinfo.com/nissan/TSB/TSB_xml/nmabstract.asp?mscssid=&VdocID=54792&phydoc=Y&FileName=1\R\Q\1RQ26.PDF&VRefNo=NTB05058 "NTB05058 Nissan technical service bulletin regarding power valve screws"]
* [http://www.sportcompactcarweb.com/editors/technobabble/0112scc_technobabble/ "Technobabble: December 2001] by Dave Coleman, "SportCompactCar", December 2001, retrieved June 26, 2006

==External links==
* [http://www.b15u.com "B15U.com - A Nissan Sentra Forum"]
* [http://b15sentra.net "B15sentra.net - Another Nissan Forum for both B15 and B16 Sentras."]
* [http://allsentra.com "AllSentra.com - A Forum for all Sentras"]

{{nissan}}

[[Category:Nissan engines|QR]]
[[Category:Straight-four engines]]
[[Category:Gasoline engines by model]]