Buick Regal Sportback (2018) is 572 mm (22.52 inch) longer and 90 mm (3.54 inch) wider than Honda HR-V (2020).
Honda HR-V (2020) is 150 mm (5.91 inch) higher, 325 kg (717 lbs) lighter and has 218 liters (7.70 ft3) bigger cargo space than Buick Regal Sportback (2018).