Citroen C1 (2014) is 337 kg (743 lbs) lighter than Mazda 6 Atenza (2018).
Mazda 6 Atenza (2018) is 809 mm (31.85 inch) longer, 148 mm (5.83 inch) wider, 74 mm (2.91 inch) higher and has 325 liters (11.48 ft3) bigger cargo space than Citroen C1 (2014).