BMW 3 Series Gran Turismo (2021) is 183 mm (7.20 inch) longer, 23 mm (0.91 inch) wider, 89 mm (3.50 inch) higher and has 140 liters (4.94 ft3) bigger cargo space than Cadillac ATS (2016).
Cadillac ATS (2016) is 75 kg (165 lbs) lighter than BMW 3 Series Gran Turismo (2021).