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 = 1999–present | configuration = Inline-four | valvetrain = DOHC 4 valves x cyl. with VVT | block = Aluminum | head = Aluminum | predecessor = Nissan SR engine<br>Nissan KA engine | successor = Nissan MR engine (only for QR20DE)<br />Nissan PR engine (only for QR25DE) | fueltype = Gasoline | fuelsystem = Port Fuel Injection or Direct Fuel Injection | coolingsystem = 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 inline-four piston engines by Nissan were introduced in 1999 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 direct injection. The engine shares much of its architecture with the YD diesel engine.

==QR20DE== thumb|QR20DE

The {{convert|1998|cc|L|1|abbr=on|disp=flip}} '''QR20DE''' produces {{convert|140|PS|kW hp|0|abbr=on}} at 6000 rpm and {{convert|200|Nm|lbft|0|abbr=on}} at 4000 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 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 * 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.[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 rpm and {{convert|200|Nm|lbft|0|abbr=on}} at 4400 rpm.<ref name="SAE01"/>

Vehicle applications: * 2000-2004 Nissan Bluebird Sylphy

==QR25DE== 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 shafts, 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 rpm with {{convert|244|Nm|lbft|0|abbr=on}} 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.<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/http://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 | access-date = 2006-06-30 | url-status = dead }}</ref> The redline is 6100 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, 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 {{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 {{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 * 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 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 DLC coating on the valve lifter buckets for reduced friction. It produces {{convert|125|kW|PS hp|0|abbr=on}} at 5600 rpm and {{convert|245|Nm|lbft|0|abbr=on}} at 4000 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 rpm and {{convert|243|lbft|Nm|0|abbr=on}} at 3600 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 Hybrid * 2016 only 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] {{Webarchive|url=https://web.archive.org/web/20060719073222/http://www.sportcompactcarweb.com/editors/technobabble/0112scc_technobabble/ |date=2006-07-19 }} 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"]

QR Category:Straight-four engines Category:Gasoline engines by model