Audi A6 Avant (2018) is 313 mm (12.32 inch) longer, 127 mm (5.00 inch) wider and has 138 liters (4.87 ft3) bigger cargo space than Nissan Sentra (2019).
Nissan Sentra (2019) is 28 mm (1.10 inch) higher and 600 kg (1,323 lbs) lighter than Audi A6 Avant (2018).
