The Renault-Nissan MR engine family consists of straight-four 16-valve all-aluminium and water cooled automobile engines with variable valve timing co-developed by Renault and Nissan. Renault calls it the M engine. Other noteworthy features of this engine family include acoustically equal runner lengths and a tumble control valve for the intake manifold, a "silent" timing chain, mirror finished crankshaft and camshaft journals, and offset cylinder placement in an attempt for increased efficiency. The MR engine family features 'under stress' manufacture, meaning while the block is being bored, a torque plate puts the block under stress. The block becomes temporarily distorted until the head is torqued onto it, at which point the block is pulled into the correct shape.

MR16DDT (Renault M5Mt)

The MR16DDT is a 1618 cc DIG-T (Direct Injection Gasoline-Turbocharged) inline-four 16-valve engine, with a bore x stroke of 79.7x81.1 mm. It was first introduced in the Nissan Juke small SUV in the autumn of 2010. Output is 190 PS and 240 Nm of torque. The 2014 Juke NISMO RS FWD produced 215 PS and 285 Nm. In 2015, the Nissan Teana received this 1.6 Turbo as a replacement for the earlier 2.0-liter naturally aspirated engine. In 2013, it entered Renault's lineup in the Sport Clio as the M5Mt, where it generates 200 PS and 177 lbft. Some of the pertinent features of the MR16DDT are: Applications:

MR18DE

The MR18DE is a 1798 cc version with bore and stroke of 84x81.1 mm and a power of 130 PS, developed by Nissan, and first installed in the Nissan Tiida in 2004. In North America the output is 122 hp at 5500 rpm and 174 Nm at 4800 rpm. From July 6, 2006, this engine is also fitted to Nissan Livina Geniss for China version and the Nissan Grand Livina for Indonesia and Malaysia. Output is 126 PS at 5200 rpm and 174 Nm at 4800 rpm. For Brazil, this engine is fitted to the Tiida and Livina ranges, with Flex-fuel capability. Applications:

MRA8DE

The MRA8DE is a 1797 cc engine, different from the MR18DE as it has a twin variable valve timing system on both the intake and exhaust valves and uses a diamond-like carbon coating. Bore and stroke is 79.7x90.1 mm. It produces 130 PS at 6000 rpm and 174 Nm at 3600 rpm, and has a compression ratio of 9.9:1. Applications:

MR18DDT (Renault M5Pt)

The MR18DDT is a 1797 cc engine, different from the MR18DE and MRA8DE as it has a turbocharged, twin variable valve timing system on both the intake and exhaust valves and uses a diamond-like carbon coating. Bore and stroke is 79.7x90.1 mm. It produces 225 - 300 PS at 6000 rpm and 300 - 420 Nm at 3600 rpm, and has a compression ratio of 9.0:1. It is used in the Renault and Alpine vehicles since 2015, where it is named M5Pt. Applications:

MR20DE (Renault M4R)

The MR20DE, a 1997 cc engine, was the first MR series engine developed by Nissan as a replacement for the QR20DE. It is an undersquare engine, its bore and stroke being 84x90.1 mm, respectively. It was first introduced in the Lafesta and Serena MPVs and Renault Samsung SM5 in early 2005. In November 2006, it entered Renault's lineup in the Clio III as the M4R, where it generates 147 PS. This engine is available with Nissan's XTRONIC CVT continuously variable transmission in several applications. A detuned version, with 133 PS instead of 147 PS, was added to the new Bluebird Sylphy in late 2006. In the new Nissan X-Trail, Qashqai and C-Platform Sentra, the MR20DE produces 147 PS at 5100 rpm and 199 Nm of torque at 4800 rpm. Middle East version of the MR20DE engine that goes in the Nissan Qashqai produces 150 PS at 5200 rpm and 200 Nm of torque at 4400 rpm. Applications:

MR20DD (Renault M5R)

The MR20DD is a 1997 cc engine developed by Nissan with direct injection and twin variable valve timing control. The MR20DD engine is "SU-LEV" certified in Japan, and produces 108 kW at 5600 rpm and 155 lbft of torque at 4400 rpm in its first permutation, with a 11.2:1 compression ratio. Export models claim 102 kW at 5200 rpm and 147 lbft at 4400 rpm. In 2016, it entered Renault's lineup in the Koleos II as the M5R, and is also in the eight generation Sentra, where it produces 148 hp @6400rpm and 146 lbft @4400rpm with a compression ratio of 10.6:1. The Australian & New Zealand market Nissan Qashqai ST and Ti models use a variant of the MR20DD which achieves 106 kW at 6000 rpm and 200 Nm at 4400 rpm and a compression ratio of 11.2:1. In the Nissan Rogue Sport and second generation Kicks, a similar version produces 141 hp @6000rpm and 140. lbft @4000rpm. The fifth generation Nissan Serena uses a version of this engine with a 12.5:1 compression ratio, outputting 150. PS @6000rpm and 200. Nm @4400rpm. Applications:

MR20DD Hybrid

The MR20DD Hybrid is a 1997 cc Hybrid engine developed by Nissan with direct injection and twin variable valve timing control. The MR20DD Hybrid engine is "SU-LEV" certified in Japan, and produces 144 PS at 6000 rpm and 147 lbft of torque at 4400 rpm. with Synchronous Electric Motor produces 41 PS and 118 lbft of torque and lithium-ion battery, for a combined power of 179 PS. Applications:

MR20DD S-Hybrid

The MR20DD S-Hybrid is a 1997 cc Hybrid engine developed by Nissan with direct injection and twin variable valve timing control. The MR20DD S-Hybrid engine is MHEV "SU-LEV" certified in Japan, and produces 150 PS at 6000 rpm and 147 lbft of torque at 4400 rpm. With synchronous electric motor and 48 V battery. Applications:

M9 diesel

The M9R and M9T are a family of straight-four 16-valve turbocharged diesel engines co-developed by Nissan and Renault, and also Mercedes-Benz Group in the case of the M9T/OM699. Following Renault's designation plan, the last letter (M9R resp. M9T) is to indicate the swept volume of 2.0 L resp. 2.3 litres. Despite the similar names, the diesel engines are only loosely related to the MR gasoline engines. M9R is built at Renault's Cleon factory in Normandy. As of late 2018, a new version of the M9R using adBlue and with slightly different internal dimensions replaced the original M9R. Features of the diesel engines include a cast-iron block, aluminium alloy cylinder head with double overhead camshafts, 16-valve layout and a bushes timing chain. The M9T is directed to heavier vehicles like the Nissan Navara or the Renault Master. It features a bore and stroke of 85x101.3 mm for a total displacement of 2299 cc, balancer shafts, typical speeds are 3500 rpm for maximum power and 1250 rpm for maximum torque. Low output versions of the M9R for the Renault Trafic II at 66 and 85 kW had been replaced by the Renault R engine with the introduction of the Trafic III, while versions starting from 96 kW include VNT chargers. The top version of the Navara utilizes the M9T with twin-turbochargers and 190 PS. During production period engines had been updated up to Euro 6 (in early 2017).

M9R

The M9R is a 1995 cc 16-valve turbocharged diesel engine developed by the Renault–Nissan Alliance, and first installed in the Renault Laguna in 2006. It is available in the 150 PS tune in Nissan Qashqai, Nissan X-Trail, Renault Mégane, Renault Koleos and Renault Laguna models. In this trim the engine achieves maximum power at 4000 rpm and maximum torque of 340 Nm at 2000 rpm. A 175 PS form with particulate filter is available in Renault Laguna and Nissan X-Trail models. A 180 PS variant is also available on the Laguna GT. In both engines maximum power is achieved at 3750 rpm and maximum torque is available from 1750 rpm. In order to reduce vibrations, balance shafts are included in some versions of the engine. The 2.0 dCi engine in all its versions complies with the Euro 4 and 5 standards for exhaust emissions. The 150 PS New Mégane and New Laguna respectively emitted 144 g/km and 154 g/km of CO2 and the 129 kW version of New Laguna 2.0 dCi emits 159 g/km of CO2; they all comply with the Euro 5 standards for exhaust emissions. In 2011 the 96 and 110 kW M9R engines has been updated with an optional package to lower exhaust emissions (Euro5) and fuel consumption. These engines are tagged "2.0 Energy dCi 130" resp. "2.0 Energy dCi 150", typically maximum power is available at 3750 rpm and maximum torque at a minimum of 1750 rpm. The package comprises: The CO2 values were thus reduced to 118 g/km for the Laguna both the 2.0 Energy dCi 130 and 2.0 Energy dCi 150. Towards the end of 2018, the 2-liter M9R engine became the "M9R Gen 5" when it received a thorough redesign to comply with the increasingly stringent anti-pollution regulations: first of all the engine dimensions were changed, from 84x90 mm to 85x88 mm - using the same bore as the larger M9T but with nearly no change in displacement, which increases by 2 cc to 1997 cc. Another important innovation introduced with this update was the BluedCi technology, which involves the installation of a small tank of adBlue, a chemical additive that is injected upstream of the catalyst and which, when combined with the exhaust gas, causes a reaction chemistry within the catalyst itself. This reaction transforms most of the nitrogen oxides into harmless nitrogen and water vapor. This engine debuted in two power levels, 160 and 200 PS, in the Renault Talisman II 2.0 Blue dCi which was produced from December 2018. In December 2020 a single 190 PS version replaced both of the earlier versions. The engine is fitted to the following vehicles:

M9T

The M9T is a version specifically designed for light commercial vehicles that is manufactured by Renault in Cléon. It was introduced on the Renault Master and its badge engineered derivatives, initially with power ranging from 75 kW to 110 kW, and torque ratings starting at 185 Nm up to 350 Nm. Later, it was also introduced to the Nissan Navara and the Mercedes-Benz X-Class. Nissan calls it the YS23 while in Mercedes-Benz vehicles, it is named the OM699. The engines with lower power ratings feature a single fixed geometry turbocharger, while the more powerful versions have a variable-geometry turbocharger or twin-turbochargers. The engines are compliant with the Euro 6 emission regulations. Applications: