BMW 8 Series (G15) (2018) is 180 mm (7.09 inch) longer, 60 mm (2.36 inch) wider and has 126 liters (4.45 ft3) bigger cargo space than Cadillac ATS Coupe (2015).
Cadillac ATS Coupe (2015) is 51 mm (2.01 inch) higher and 374 kg (825 lbs) lighter than BMW 8 Series (G15) (2018).