BMW 5 Series (2014) is 46 mm (1.81 inch) wider and 64 mm (2.52 inch) higher than Chevrolet Impala (2015).
Chevrolet Impala (2015) is 114 mm (4.49 inch) longer, 76 kg (168 lbs) lighter and has 94 liters (3.32 ft3) bigger cargo space than BMW 5 Series (2014).