BMW Z4 (2018) is 2 mm (0.08 inch) wider and 183 kg (403 lbs) lighter than Buick Regal TourX (2018).
Buick Regal TourX (2018) is 662 mm (26.06 inch) longer, 179 mm (7.05 inch) higher and has 319 liters (11.27 ft3) bigger cargo space than BMW Z4 (2018).