High Quality Content by WIKIPEDIA articles! The Mitsubishi 4N1 engine is a family of all-alloy four cylinder diesel engines currently being developed by Mitsubishi Motors, to be produced at the company's powertrain facility in Kyoto, Japan for use in Mitsubishi's small to mid-sized global passenger cars. In June 2006, Mitsubishi Motors and Mitsubishi Heavy Industries announced a joint development project for a new generation of clean diesel engines to be used in cars exported to Europe with a target of beginning mass production in 2010. In April 2007, Mitsubishi brought forward the introduction of the new diesel engines, with a revised target for mass production in early 2009, one year earlier than scheduled and announced that the engines will be gradually phased into other global markets. The preliminary version of the 1799 cc engine was first seen in the Concept-cX test car introduced in 2007. The larger 2268 cc was first exhibited in the Concept-ZT test car introduced in the same year and later used in the Concept-RA test car introduced in 2008.