Audi R8 Spyder (2020) is 81 mm (3.19 inch) wider and 87 kg (192 lbs) lighter than Buick Regal Sportback (2020).
Buick Regal Sportback (2020) is 474 mm (18.66 inch) longer, 215 mm (8.46 inch) higher and has 244 liters (8.62 ft3) bigger cargo space than Audi R8 Spyder (2020).