BMW 3 Series Gran Turismo (2021) is 163 mm (6.42 inch) longer, 117 mm (4.61 inch) higher and has 227 liters (8.02 ft3) bigger cargo space than Cadillac ATS Coupe (2015).
Cadillac ATS Coupe (2015) is 13 mm (0.51 inch) wider and 30 kg (66 lbs) lighter than BMW 3 Series Gran Turismo (2021).