Chrysler 300 (2017) is 27 mm (1.06 inch) longer, 71 mm (2.80 inch) higher, 103 kg (227 lbs) lighter and has 3 liters (0.11 ft3) bigger cargo space than Dodge Challenger (2018).
Dodge Challenger (2018) is 18 mm (0.71 inch) wider than Chrysler 300 (2017).