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Nissan MR engine

From Alfawiki
Renault-Nissan MR engine series
Company typeJoint venture product
IndustryAutomotive
FounderRenault and Nissan
Area served
Global
ProductsInline-four, 16-valve, all-aluminum, water-cooled engines with variable valve timing technology

The Renault-Nissan MR engine series consists of inline-four, 16-valve, all-aluminum, water-cooled powerplants equipped with variable valve timing technology, jointly engineered by Renault and Nissan. Renault refers to this lineup as the M engine. Notable design elements include intake runners tuned for acoustic balance, tumble control valves, a noiseless timing chain, polished crankshaft and camshaft journals, and offset cylinders aimed at improving operational efficiency.

During manufacturing, the engine block undergoes stress application and is torqued while boring to ensure dimensional stability once the cylinder head is mounted.


MR15DDT

Third-generation 1.5L three-cylinder hybrid engine with E-power technology

Utilization:


MR16DDT (Renault M5Mt)

The MR16DDT is a turbocharged inline-four gasoline engine featuring direct injection and 16 valves, with bore and stroke dimensions of mm. Debuting in the Nissan Juke in 2010, it delivers PS and Nm of torque. The 2014 Juke NISMO RS front-wheel-drive model offers an output of PS and Nm. In 2015, it succeeded the naturally aspirated 2.0L unit in the Nissan Teana. Renault markets this engine as the M5Mt in the Renault Clio RS, where it generates PS and Nm.

Primary specifications:

  • Dual continuous variable valve timing (CVTCS) on both intake and exhaust
  • Turbocharging complemented by an intercooler
  • Compression ratio set at 9.5:1
  • Engine architecture optimized for lightness and minimized friction

Implemented in:


MR18DE

The MR18DE is a inline-four engine with bore and stroke measuring , delivering power of , developed by Nissan, and initially introduced in the Nissan Tiida in 2004.

In the North American market, it produces at 5500 rpm alongside torque of at 4800 rpm.

From mid-2006 onwards, this engine was installed in the Nissan Livina Geniss (China) and Nissan Grand Livina models sold in Indonesia and Malaysia, offering outputs of at 5200 rpm and torque of at 4800 rpm.

Brazilian Tiida and Livina variants utilize this powerplant with Flex-fuel compatibility.

Notable deployments:


MRA8DE

The MRA8DE is a inline-four unit featuring dual variable valve timing on both intake and exhaust valves combined with a diamond-like carbon coating. The bore and stroke are . It achieves peak power of at 6000 rpm and torque of at 3600 rpm, maintaining a compression ratio of 9.9:1.

Applications include:

MR18DDT (Renault M5Pt)

The MR18DDT is a turbocharged powerplant equipped with dual variable valve timing on both intake and exhaust valves, along with a diamond-like carbon coating. Its bore and stroke measure . This engine produces between at 6000 rpm and torque ranging from at 3600 rpm, featuring a compression ratio of 9.0:1. Since 2015, it has been utilized in Renault and Alpine models under the M5Pt designation.

Applications:

MR20DE (Renault M4R)

The MR20DE is an undersquare engine (bore x stroke: ) engineered by Nissan as the successor to the QR20DE. It debuted in early 2005 on Nissan Lafesta and Serena MPVs, as well as the Renault Samsung SM5, before entering Renault's portfolio in November 2006 as the M4R in the Clio III, delivering .

A version paired with Nissan's XTRONIC CVT transmission is detuned to produce for the Bluebird Sylphy introduced in late 2006. In vehicles such as the Nissan X-Trail, Qashqai, and Sentra, it generates at 5100 rpm and torque at 4800 rpm. The Middle Eastern Qashqai variant outputs at 5200 rpm and at 4400 rpm.

Applications:

MR20DD (Renault M5R)

The MR20DD is a direct-injection engine created by Nissan, featuring twin variable valve timing. It holds "SU-LEV" certification in Japan, producing at 5600 rpm and torque at 4400 rpm with an elevated compression ratio of 11.2:1. Export models deliver output figures of at 5200 rpm and torque at 4400 rpm.

Incorporated by Renault as the M5R in the second-generation Koleos II starting in 2016, this engine also powers the eighth-generation Sentra, where it produces at 6400 rpm and torque at 4400 rpm with a compression ratio of 10.6:1.

The Australian and New Zealand versions of the Nissan Qashqai ST and Ti utilize a variant generating power of at 6000 rpm and torque at 4400 rpm, maintaining an 11.2:1 compression ratio. In North America, the similar engine found in the Nissan Rogue Sport and second-generation Kicks delivers output of at 6000 rpm and torque at 4000 rpm.

The fifth-generation Serena employs a version with an increased compression ratio of 12.5:1, producing power of at 6000 rpm and torque at 4400 rpm.

Applications:

MR20DD Hybrid

The MR20DD Hybrid engine by Nissan incorporates direct fuel injection alongside dual variable valve timing, designed as a hybrid power unit. It holds the "SU-LEV" certification in Japan and delivers at 6000 rpm with torque reaching at 4400 rpm. Paired with a synchronous electric motor generating and torque, together with a lithium-ion battery, the system achieves an aggregate output of .

Applications:

MR20DD S-Hybrid

The MR20DD S-Hybrid represents a mild hybrid (MHEV) variant from Nissan, also equipped with direct injection and twin variable valve timing technology. This engine is "SU-LEV" certified in Japan, producing at 6000 rpm and torque of at 4400 rpm. It is complemented by a synchronous electric motor supported by a 48 V battery system.

Applications:

M9 diesel

The M9R and M9T are turbocharged inline-four diesel engines with 16 valves, jointly developed by Nissan, Renault, and Mercedes-Benz Group (specifically for the M9T/OM699). These engines, distinct from Nissan’s MR petrol series, come in two displacements: the M9R at 2.0 liters and the M9T at 2.3 liters. The M9R is manufactured at Renault’s Cleon plant in Normandy, France. Around late 2018, an updated M9R model incorporating AdBlue technology replaced the original version.

These diesel engines feature cast-iron blocks combined with aluminum alloy cylinder heads, utilizing DOHC architecture with timing chains and 16 valves. The M9T is primarily designed for heavier-duty vehicles such as the Nissan Navara and Renault Master, featuring bore and stroke dimensions of and a total displacement of , including balancer shafts to reduce vibrations. Maximum power output is achieved near 3500 rpm, while peak torque occurs around 1250 rpm.

Lower-powered versions of the M9R ( and kW) used in the Renault Trafic II were superseded by the Renault R engine in the Trafic III model. Higher-performance variants starting from kW are equipped with variable geometry turbochargers (VNT). The top-tier Navara M9T model employs twin turbochargers delivering . Engine refinements continued through early 2017 to comply with Euro 6 emissions standards.

M9R

The M9R is a turbocharged diesel engine with 16 valves developed under the Renault–Nissan Alliance. It debuted in the Renault Laguna during 2006. This engine is available in a version across several models including the Nissan Qashqai, Nissan X-Trail, Renault Mégane, Renault Koleos, and Renault Laguna. This configuration produces peak power at 4000 rpm and maximum torque of at 2000 rpm. Enhanced output variants include a version featuring a particulate filter for the Laguna and X-Trail, as well as a Laguna GT model—both achieving peak power at 3750 rpm with torque available from 1750 rpm.

Certain versions incorporate balance shafts aimed at minimizing engine vibrations. All comply with Euro 4 and Euro 5 emission regulations. The New Mégane and Laguna models emit CO2 in the range of /km to /km, meeting Euro 5 standards.

In 2011, an update branded "Energy dCi" enhanced the M9R engines to improve fuel economy and reduce emissions to meet Euro 5 requirements. This upgrade introduced features such as Stop & Start functionality, active thermal management, intelligent electrical system control, and a variable capacity oil pump. These improvements lowered CO2 emissions to approximately 118 g/km for both Laguna variants.

By late 2018, the M9R underwent redesign as "M9R Gen 5" to satisfy more stringent emission limits. Its bore and stroke were modified from mm to mm, slightly increasing displacement to 1997 cc. This generation introduced BluedCi technology that injects AdBlue ahead of the catalytic converter to convert nitrogen oxides into harmless nitrogen and water vapor. Initially available in two power levels— and PS—in the Renault Talisman II Blue dCi from December 2018, it was later consolidated into a single 190 PS variant by December 2020.

The M9R engine has been utilized in numerous vehicles:

M9T

The M9T is a 2.3-liter inline-four diesel powerplant engineered by Renault in Cléon, tailored primarily for light commercial vehicle applications. Initially introduced in the Renault Master and its rebadged counterparts, this engine delivered outputs ranging from to , with torque figures between and . Subsequently, the engine found its way into the Nissan Navara and Mercedes-Benz X-Class lineups, where it is marketed under the names YS23 and OM699, respectively.

Lower-output variants are equipped with a single fixed-geometry turbocharger, whereas models with increased performance incorporate either variable-geometry or twin-turbocharging systems. The M9T complies with Euro 6 emission regulations, fulfilling stringent standards set for commercial vehicle engines.

Notable vehicles powered by this engine include:


See also

External links

References

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