BMW 8 Series (G15) (2018) is 258 mm (10.16 inch) longer and 39 mm (1.54 inch) wider than Peugeot 308 SW (2020).
Peugeot 308 SW (2020) is 131 mm (5.16 inch) higher, 574 kg (1,265 lbs) lighter and has 188 liters (6.64 ft3) bigger cargo space than BMW 8 Series (G15) (2018).