BMW 5 Series Gran Turismo (2015) is 175 mm (6.89 inch) longer, 43 mm (1.69 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 465 kg (1,025 lbs) lighter than BMW 5 Series Gran Turismo (2015).