BMW 5 Series Gran Turismo (2018) is 668 mm (26.30 inch) longer, 99 mm (3.90 inch) wider and has 9 liters (0.32 ft3) bigger cargo space than Mazda 6 Atenza (2018).
Mazda 6 Atenza (2018) is 74 mm (2.91 inch) higher and 406 kg (895 lbs) lighter than BMW 5 Series Gran Turismo (2018).