BMW 5 Series Gran Turismo (2017) is 346 mm (13.62 inch) longer, 87 mm (3.43 inch) wider, 59 mm (2.32 inch) higher and has 40 liters (1.41 ft3) bigger cargo space than Opel Astra (2014).
Opel Astra (2014) is 510 kg (1,124 lbs) lighter than BMW 5 Series Gran Turismo (2017).