Nissan QR engine

Template:Insufficient inline citations Template:Infobox automobile engine

The QR family of inline-four piston engines by Nissan were introduced in 2000 and range from Template:Convert 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.

QR20DEEdit

File:Nissan QR20DE Motor.JPG

QR20DE

The Template:Convert QR20DE produces Template:Convert at 6000 rpm and Template:Convert at 4000 rpm. The bore and stroke is Template:Convert and a compression ratio of 9.9:1.<ref name=SAE01>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The QR20DE was replaced with the MR20DE engine in most applications in early 2005.

Vehicle applications:

2001-2007 Nissan X-Trail T30, Template:Cvt
2001-2007 Nissan Primera P12
2002–present Nissan Serena C24, Template:Cvt
2003-2008 Nissan Teana J31, Template:Cvt
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

QR20DDEdit

The QR20DD is similar to the QR20DE but features NEO direct injection to improve fuel economy and to reduce emissions.[1] It produces Template:Convert at 6000 rpm and Template:Convert at 4400 rpm.<ref name="SAE01"/>

Vehicle applications:

2000-2004 Nissan Bluebird Sylphy

QR25DEEdit

File:2001 Nissan QR25DE engine left.jpg

Nissan QR25DE Engine

The QR25DE is a Template:Convert 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 Template:Convert and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Output is rated Template:Cvt at 6000 rpm with Template:Convert 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>Template:Cite magazine</ref> The redline is 6100 rpm.<ref name=Jacquot2001/> Altimas that are PZEV compliant create Template:Convert and Template:Convert of torque.[2] In the 2005+ Nissan Frontier the QR25DE generates Template:Convert and Template:Convert of torque.[3]

2007+ QR25DEEdit

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.

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1999–2003 Nissan Bassara Template:Convert
2001–2005 Nissan Serena C24 Template:Convert
2001–2007 Nissan X-Trail T30 APEC export version Template:Convert
2002–2006 Nissan Sentra SE-R Template:Convert & SE-R Spec V Template:Convert
2002–2009 Nissan Presage Template:Convert
2002–2020 Nissan Altima Template:Convert to Template:Convert
2003–2005 Nissan Teana Template:Convert
2003–2014 Nissan Murano (Japan)
2005–2019 Nissan Frontier Template:Convert
2007–2012 Nissan Sentra SE-R Template:Convert & SE-R Spec V Template:Convert
2007–2011 Nissan Altima Hybrid Template:Convert, combined Template:Convert
2007–2020 Nissan X-Trail T31 Template:Convert
2007–2023 Renault Koleos TR25 Template:Convert
2008–2020 Nissan Rogue Template:Convert
2009–2012 Suzuki Equator Template:Convert
2010–present Nissan Elgrand E52
2013–2020 Nissan Teana Template:Convert
2013–present Nissan X-Trail T32 Template:Convert
2014-present Nissan Urvan E26
2018–present Nissan Terra- Template:Convert Template:Convert
2020–present Nissan X-Terra-

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QR25DDEdit

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 Template:Convert at 5600 rpm and Template:Convert at 4000 rpm.<ref name="SAE01"/>

Vehicle applications:

2002-2006 Nissan Primera P12 (JDM)

QR25DEREdit

The QR25DER is similar to the QR25DE but has a supercharger for increased power and is coupled with a Template:Convert 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>Template:Citation</ref>) and produces a combined Template:Cvt at 5600 rpm and Template:Convert at 3600 rpm.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Vehicle applications: