BMW 3 Series Gran Turismo (2019) is 549 mm (21.61 inch) longer, 60 mm (2.36 inch) wider and has 13 liters (0.46 ft3) bigger cargo space than Mazda 6 Atenza (2014).
Mazda 6 Atenza (2014) is 34 mm (1.34 inch) higher and 461 kg (1,016 lbs) lighter than BMW 3 Series Gran Turismo (2019).