When the Dodge Dart was launched, press books included talk of a 2.4-liter variant named the Dodge Dart R/T, which was due to come out around January 2013. With production pushed back to late spring or summer, a name change appears to be the only difference in the car, leaving many to wonder why it has been delayed for so long. While the Dundee, Michigan plant currently makes the 2.0 and 2.4 liter engines, they do not appear to be making the MultiAir equipped TigerShark version of the 2.4; indeed, the Jeep Compass and Patriot surprised many observers when, debuting their new six-speed automatic, the twins kept the existing 2.4 liter engine. MultiAir, by varying the valve behavior of each cylinder individually with each cycle, increases the efficiency of engines, but at a moderately high cost; Chrysler may have decided that the technology was not suited for the Compass..
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