Audi Q3 (2017) is 23 mm (0.91 inch) wider, 196 mm (7.72 inch) higher, 263 kg (580 lbs) lighter and has 49 liters (1.73 ft3) bigger cargo space than BMW 4 Series Gran Coupe (2018).
BMW 4 Series Gran Coupe (2018) is 154 mm (6.06 inch) longer than Audi Q3 (2017).
