Maserati Quattroporte (2019) is 988 mm (38.90 inch) longer, 180 mm (7.09 inch) wider and has 9 liters (0.32 ft3) bigger cargo space than Mazda 6 Atenza (2018).
Mazda 6 Atenza (2018) is 61 mm (2.40 inch) higher and 567 kg (1,250 lbs) lighter than Maserati Quattroporte (2019).
