The MR is a family of straight-4 all-aluminum 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 for an attempt in 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.
The MR16DDT is a 1.6 L (1618 cc) DIG-T (Direct Injection Gasoline Turbo-charged) engine, bore is 79.7 mm (3.14 in) and stroke is 81.1 mm (3.19 in). It was first introduced in the Nissan Juke small SUV in the autumn of 2010. Output is 188 hp (140 kW) and 177 lb·ft (240 N·m). The 2014 Juke RS NISMO produced 215 hp (160 kW) and 210 lb·ft (285 N·m).in 2015 Nissan Teana use 1.6 Turbo as Replacement of the old 2.0 engine.
Some of the pertinent features of the MR16DDT are:Twin variable valve timing control (CVTCS on intake and exhaust valves)
Turbo-charged and intercooled
Compression ratio of 9.5:1
Light weight design and reduced frictions
Applications:2011–present Nissan Juke
2014–present Nissan Juke RS NISMO (215 hp (160 kW) and 210 lb·ft (285 N·m))
2013–present Nissan Tiida (hatchback)/Nissan Pulsar/Nissan Sylphy
2012 Nissan Deltawing Race car (Not-Production) (300 hp @7400 rpm)
2013–present Renault Sport Clio （M5M） 197 hp (147 kW)/177 lb·ft (240 N·m)
2013–present Renault Samsung SM5 TCE （M5M）
2015-present Nissan X-Trail (161 hp)
2015-present Nissan Teana L33 (190 hp)
2015-present Renault Talisman TCE (150 hp, 200hp)
2016-present Renault Samsung SM6 TCE (190 hp)
2017-present Nissan Sentra SR Turbo
2017-present Nissan Sentra NISMO
The MR18DE is a 1.8 L (1797 cc) version, bore is 84.0 mm (3.31 in) and stroke is 81.1 mm (3.19 in). It produces 130 hp (97 kW) .
In America the output is 122 hp (91 kW) at 5500 rpm and 174 N·m (128 lb·ft) at 4800 rpm.
On July 6, 2006 this engine is also fitted to Nissan Livina Geniss for China version and Nissan GRAND LIVINA for Indonesia and Malaysia version. Output is 126 hp (94 kW) at 5,200 rpm and 174 N·m (128 lb·ft) at 4,800 rpm.
For Brazil, this engine is fitted to the Tiida and Livina ranges, with Flex-fuel capability.
Applications:2004–2012 Nissan Tiida/Versa
2006–present Nissan Grand Livina
2006–present Nissan Wingroad
The MRA8DE is a 1.8 L (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 is 79.7 mm (3.14 in) and stroke is 90.1 mm (3.55 in). It produces 130 hp (97 kW) at 6,000rpm and 174 N·m (128 lb·ft) at 3,600rpm, and has a compression ratio of 9.9:1.
Applications:2013–present Nissan Sylphy B17 (Asian)/Nissan Sentra (North America and Middle east)/Nissan Pulsar (Australasia)
The MR20DE, a 2.0 L (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 being 84.0 mm (3.31 in) and stroke 90.1 mm (3.55 in). 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 138 PS (101 kW; 136 hp).
This engine is available with Nissan's XTRONIC CVT continuously variable transmission in several applications.
A detuned version, with 133 PS (98 kW) instead of 137 PS (101 kW; 135 hp), was added to the new Bluebird Sylphy in late 2006. In the new Nissan X-Trail, Qashqai and C-Platform Sentra the MR20DE produces 139.36 hp (104 kW) at 5100 rpm and 193 N·m (142 lb·ft) at 4800 rpm. Middle East version of the MR20DE engine that goes in the Nissan Qashqai produces 136.88 hp (102 kW) at 5200 rpm and 198 N·m (146 lb·ft) at 4400 rpm.
Applications:2005–present Nissan Serena
2005–present Renault Samsung SM5
2005–2012 Nissan Bluebird Sylphy
2006–present Renault Clio
2007–present Nissan X-Trail
2007–present Nissan Qashqai
2007–2012 Nissan Sentra
2007–present Renault Laguna
2008–2014 Nissan Teana(J32)
2008–present Renault Safrane
2008–present Renault Mégane(III)
2009–present Renault Scénic
2009–present Renault Fluence
2009–present Renault Samsung SM3
2009–present Renault Latitude
2013–present Nissan NV200
2013–present Nissan Sentra (Brazil only - Flex Fuel (gasoline and ethanol)
The MR20DD is a 2.0 L (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 147 hp (110 kW) at 5,600 rpm and 155 lb·ft (210 N·m) of torque at 4,400 rpm. [Export markets: 136.88 hp (102 kW) at 5,200 rpm and 147 lb·ft (199 N·m) at 4,400 rpm]
The Australian market Nissan Qashqai ST and Ti models utilise variant of the MR20DD which achieves 106kW at 6000rpm and 200Nm at 4400rpm.
Applications:2010–present Nissan Serena
2013–present Nissan X-Trail
2014–present Australian Market Nissan Qashqai
The M9R is a family of straight-4 automobile Diesel engines featuring a cast-iron block, co-developed by Renault and Nissan. Renault calls it the M engine. Although it is called M9R, it has almost nothing common with MR gasoline engines. Other features of the engine are a double overhead camshaft, 16-valve layout and a bushes timing chain.
The engine is available in the 149.82 PS (110 kW) tune in Nissan Qashqai, Nissan X-Trail, Renault Mégane, Renault Koleos and Renault Laguna models. In this trim the engine achieves maximum power at 4,000 rpm and maximum torque (340 N·m (250 lb·ft)) at 2,000 rpm. A 175.7 PS (129 kW) form with particulate filter is available in Renault Laguna and Nissan X-Trail models. A 179.78 PS (132 kW) variant is also available on the Laguna GT. In both engines maximum power is achieved at 3,750 rpm and maximum torque is available from 1,750rpm.
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 149.82 PS (110 kW) New Mégane and New Laguna respectively emitted 144 g/km and 154 g/km of CO2 and the 175 hp (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.
The 130.75 PS (96 kW) and 149.82 PS (110 kW) M9R engines for the Laguna were updated in 2011 to include some fuel emission optimizations:Stop & Start
Electrical Smart Management
They were renamed "2.0 Energy dCi". The CO2 values were thus reduced to 118 g/km for both the 2.0 Energy dCi 130 and 2.0 Energy dCi 150.
It is fitted to the following vehicles:2007–present Nissan Qashqai
2007–present Nissan X-Trail
2005–2015 Renault Laguna
2006–2015 Renault Mégane
2007–2015 Renault Koleos
2006–2014 Renault Espace
2007–2010 Renault Vel Satis
2015 Nissan Teana