BMW 4 Series (2013) is 11 mm (0.43 inch) wider than Vauxhall Astra (Sedan) (2020).
Vauxhall Astra (Sedan) (2020) is 20 mm (0.79 inch) longer, 138 mm (5.43 inch) higher, 180 kg (397 lbs) lighter and has 15 liters (0.53 ft3) bigger cargo space than BMW 4 Series (2013).