Nissan MR engine
From Wikipedia, the free encyclopedia
The MR is a family of straight-4 all-aluminum automobile engines with variable valve timing co-developed by Renault and Nissan. Renault call 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.
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[edit] MR18
The MR18DE is a 1.8 L (1798 cc) version, bore is 84.0 mm (3.31 in) and stroke is 81.1 mm (3.19 in). It produces 128 hp (95 kW). It complemented the Nissan Tiida and Tiida Latio's lineup in mid 2005. This engine is the only one available in the Tiida's American version, the Nissan Versa. Output is 122 hp (91 kW) @5500 rpm and 174 N·m (128 ft·lbf) @4800 rpm.
Bore : 84.0 mm (3.31 in) ; Stroke 81.1 mm (3.19 in) ; Capacity : 1797 cc
[edit] MR20
The MR20DE, a 2.0 L (1997 cc) unit was the first MR series engine developed by Nissan as 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 in early 2005. In November 2006, it entered Renault's lineup in the Clio III as the M4R, where it generates 138 PS (136 hp/101 kW).
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 (101), was added to the new Bluebird Sylphy in late 2006. In the new Qashqai and C-Platform Sentra the MR20DE produces 140 hp (104 kW) @ 5100 rpm and 193 N·m (142 ft·lbf) @ 4800 rpm.
