BMW 8 Series (G14) (2020) is 171 mm (6.73 inch) longer, 60 mm (2.36 inch) wider and has 56 liters (1.98 ft3) bigger cargo space than Cadillac ATS Coupe (2018).
Cadillac ATS Coupe (2018) is 53 mm (2.09 inch) higher and 383 kg (844 lbs) lighter than BMW 8 Series (G14) (2020).