Nissan MR engine
Kind of engine made by Nissan / From Wikipedia, the free encyclopedia
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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.
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Renault-Nissan MR engine | |
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Overview | |
Manufacturer | Nissan Motors and Renault |
Production | 2004–present |
Layout | |
Configuration | Inline 4 |
Displacement | 1.6 L (1618 cc) 1.8 L (1798 cc) 2.0 L (1997 cc) |
Cylinder bore | 79.7 mm (3.14 in) 84 mm (3.31 in) |
Piston stroke | 81.1 mm (3.19 in) 90.1 mm (3.55 in) |
Cylinder block material | Aluminum alloy |
Cylinder head material | Aluminum alloy |
Valvetrain | DOHC 4 valves x cyl. with VVT |
Compression ratio | 9.5:1, 9.9:1 |
Combustion | |
Turbocharger | In some versions |
Fuel system | Fuel injection Direct injection |
Fuel type | Gasoline (all except M9R / M9T) Diesel (M9R / M9T) |
Cooling system | Water-cooled |
Output | |
Power output | 122–300 bhp (124–304 PS; 91–224 kW) |
Torque output | 174–285 N⋅m (128–210 lb⋅ft) |
Chronology | |
Predecessor | Nissan SR engine
Renault F-Type engine |
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.