Nissan QR engine
The QR family of straight-4 piston engines by Nissan were introduced in 2000 and range from 2.0 L to 2.5 L in displacement. These motors are aluminum, dual overhead camshaft (DOHC), four-valve designs with variable valve timing and optional direct injection.
Contents
QR20DE
The 2.0 L (1998 cc) QR20DE produces 147 hp (110 kW) and 148 lb·ft (200 N·m) The bore is 89 mm with a stroke of 80.3 mm and a compression ratio of 9.9:1.[1] The QR20DE was replaced with the MR20DE.
Vehicle applications:
- 2001-2007 Nissan X-Trail T30 (140 hp)
- 2001-2007 Nissan Primera P12
- 2002–present Nissan Serena C24, 145 hp (108 kW)
- 2003-2008 Nissan Teana J31, 145 hp (108 kW)
- 2001-2005 Nissan Wingroad Y11
- 2002-2005 Nissan Avenir W11
- 2001-2004 Nissan Prairie M12
QR20DD
The QR20DD is similar to the QR20DE but features NEO direct injection to improve fuel economy and to reduce emissions.[2] It produces 150 hp (110 kW).
Vehicle applications:
- 2000-2004 Nissan Bluebird Sylphy
QR25DE
The QR25DE is a 2.5 L (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 is 89 mm with a stroke of 100 mm and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.[1]
Output is rated 175 hp (130 kW) at 6000 rpm with 180 lb·ft (244 N·m) of torque at 4000 rpm in the Altima 2.5 and Sentra SE-R models. Altimas that are PZEV compliant create 170 hp (130 kW) and 175 lb⋅ft (237 N⋅m) of torque.[3] In the 2005+ Nissan Frontier the QR25DE generates 152 hp (113 kW) and 171 lb⋅ft (232 N⋅m) of torque.[4]
Vehicle applications:
- 1999-2003 Nissan Bassara- 165 hp (123 kW)
- 2001–2005 Nissan Serena C24- 158 hp (118 kW)
- 2001-2007 Nissan X-Trail T30 APEC export version- 178 hp (133 kW)
- 2002-2006 Nissan Sentra SE-R- 165 hp (123 kW) & SE-R Spec V- 175 hp (130 kW)
- 2002-2009 Nissan Presage- 165 hp (123 kW)
- 2002–present Nissan Altima 170 hp (127 kW) to 182 hp (136 kW)
- 2003-2005 Nissan Teana- 160 hp (119 kW)
- 2003-present Nissan Murano (Japan)
- 2005–present Nissan Frontier- 152 hp (113 kW)
- 2007–2012 Nissan Sentra SE-R- 177 hp (132 kW) & SE-R Spec V- 200 hp (149 kW)
- 2007–2011 Nissan Altima Hybrid 158 hp (118 kW), combined 198 hp (148 kW)
- 2007–present Nissan X-Trail T31- 169 hp (126 kW)
- 2007–presentRenault Koleos TR25- 169 hp (126 kW)
- 2008–present Nissan Rogue- 170 hp (127 kW)
- 2009–2012 Suzuki Equator- 152 hp (113 kW)
- 2013-present Nissan Teana- 165 hp (123 kW)
- 2013-present Nissan X-Trail T32- 169 hp (126 kW)
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 central location in the block.
- Revised cam shaft profile.
- Reinforced connecting rods.
- 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.
QR25DD
The QR25DD is similar to the QR25DE but increases the compression ratio to 10.5:1 and includes direct injection. It produces 170 hp (125 kW) and 181 lb·ft (245 N·m).[5]
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 and produces a combined 250 hp (190 kW) at 5600 rpm and 243 lb⋅ft (329 N⋅m) at 3600 rpm. [2]
Vehicle applications:
- 2014 - present Nissan Pathfinder Hybrid
- 2014 - present Infiniti QX60 Hybrid
See also
References
- "2007 Nissan Altima overview"
- "2007 Nissan Altima specifications"
- "2006 Nissan Altima specifications"
- "2006 Nissan Frontier specifications
- "2006 Nissan Sentra specifications"
- "Global Vehicles", by Jack Yamaguchi, "Automotive Engineering International", June 2001, retrieved June 29, 2006
- "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"
- "Road Test: 2002 Nissan Sentra SE-R" by Josh Jacquot, "SportCompactCar", December 2001, retrieved June 26, 2006
- "Technobabble: December 2001 by Dave Coleman, "SportCompactCar", December 2001, retrieved June 26, 2006
