BMW 1 Series (2014) is 85 mm (3.35 inch) longer than Mazda 6 Atenza (2014).
Mazda 6 Atenza (2014) is 20 mm (0.79 inch) wider, 131 mm (5.16 inch) higher, 226 kg (498 lbs) lighter and has 147 liters (5.19 ft3) bigger cargo space than BMW 1 Series (2014).