BMW 8 Series (G15) (2018) is 200 mm (7.87 inch) longer, 96 mm (3.78 inch) wider and has 39 liters (1.38 ft3) bigger cargo space than Cadillac ATS (2017).
Cadillac ATS (2017) is 79 mm (3.11 inch) higher and 319 kg (703 lbs) lighter than BMW 8 Series (G15) (2018).