BMW 8 Series (G14) (2018) is 590 mm (23.23 inch) longer and 98 mm (3.86 inch) wider than Peugeot 308 (2017).
Peugeot 308 (2017) is 118 mm (4.65 inch) higher, 603 kg (1,329 lbs) lighter and has 120 liters (4.24 ft3) bigger cargo space than BMW 8 Series (G14) (2018).