BMW 4 Series (2014) is 260 mm (10.24 inch) longer, 70 mm (2.76 inch) higher, 44 kg (97 lbs) lighter and has 260 liters (9.18 ft3) bigger cargo space than Toyota GR Supra (2018).
Toyota GR Supra (2018) is 35 mm (1.38 inch) wider than BMW 4 Series (2014).