Editing Nissan QR engine (section)

==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}}