BMW 8 Series (G14) (2020) is 410 mm (16.14 inch) longer and 98 mm (3.86 inch) wider than Mercedes GLA-Class (2016).
Mercedes GLA-Class (2016) is 155 mm (6.10 inch) higher, 538 kg (1,186 lbs) lighter and has 71 liters (2.51 ft3) bigger cargo space than BMW 8 Series (G14) (2020).