BMW 1 Series (2015) is 54 mm (2.13 inch) longer than Mazda 6 Atenza (2015).
Mazda 6 Atenza (2015) is 3 mm (0.12 inch) wider, 121 mm (4.76 inch) higher, 106 kg (234 lbs) lighter and has 147 liters (5.19 ft3) bigger cargo space than BMW 1 Series (2015).