BMW 3 Series Gran Turismo (2020) is 161 mm (6.34 inch) longer, 116 mm (4.57 inch) higher and has 226 liters (7.98 ft3) bigger cargo space than Cadillac ATS Coupe (2019).
Cadillac ATS Coupe (2019) is 14 mm (0.55 inch) wider and 185 kg (408 lbs) lighter than BMW 3 Series Gran Turismo (2020).