BMW 5 Series Gran Turismo (2017) is 173 mm (6.81 inch) longer, 44 mm (1.73 inch) wider, 76 mm (2.99 inch) higher and has 98 liters (3.46 ft3) bigger cargo space than Buick Regal (2014).
Buick Regal (2014) is 250 kg (551 lbs) lighter than BMW 5 Series Gran Turismo (2017).