M156 is a rear wheel drive automobile platform developed by Maserati for use in a range of vehicles in the Fiat group. It underpins the 2013 Maserati Quattroporte and the 2013 Maserati Ghibli (in its shortened version, named "M157"). It uses four-wheel independent suspension, composed of double wishbones at the front and a multilink setup at the rear, and supports all wheel drive.
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Maserati M156 platform Wikipedia(Text) CC BY-SA