Audi Q5 (2015) is 17 mm (0.67 inch) wider, 31 mm (1.22 inch) higher, 15 kg (33 lbs) lighter and has 40 liters (1.41 ft3) bigger cargo space than BMW X4 (2016).
BMW X4 (2016) is 42 mm (1.65 inch) longer than Audi Q5 (2015).
Size difference at a glance
Audi Q5 (2015) is 0.9% shorter than BMW X4 (2016).
Audi Q5 (2015) is 0.9% wider than BMW X4 (2016).
Audi Q5 (2015) is 1.9% taller than BMW X4 (2016).
Audi Q5 (2015) is 0.8% lighter than BMW X4 (2016).
Audi Q5 (2015) is 8% larger in cargo space than BMW X4 (2016).
Summary
Audi Q5 (2015) is the larger car on 3 of 4 key dimensions.