Nissan MR engine
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The MR is a family of straight-4 all-aluminum automobile engines with variable valve timing co-developed by Renault and Nissan. 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 and stroke is 81.1 mm. 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 128 hp @5500 rpm and 174 nm @4800 rpm.
[edit] MR20
The MR20DE is a 2.0 L (1997 cc) version, the first in the family, bore is 84.0 mm and stroke is 90.1 mm. It was designed to use the XTRONIC CVT continuously variable transmission. It replaces the QR20DE, which powers the Nissan Primera and others. It was first introduced in the Lafesta and Serena MPVs in early 2005. 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 it produces 140 hp @ 5100 RPM and 193 nm (147 lbs-ft) @ 4800 RPM.
