Audi A4 Avant (2018) is 108 mm (4.25 inch) longer and 57 mm (2.24 inch) wider than Nissan X-Trail (2014).
Nissan X-Trail (2014) is 336 mm (13.23 inch) higher, 50 kg (110 lbs) lighter and has 60 liters (2.12 ft3) bigger cargo space than Audi A4 Avant (2018).
