Audi S6 (2018) is 31 mm (1.22 inch) longer and 12 mm (0.47 inch) wider than Buick Regal Sportback (2020).
Buick Regal Sportback (2020) is 15 mm (0.59 inch) higher, 153 kg (337 lbs) lighter and has 71 liters (2.51 ft3) bigger cargo space than Audi S6 (2018).
Size difference at a glance
Audi S6 (2018) is 0.6% longer than Buick Regal Sportback (2020).
Audi S6 (2018) is 0.6% wider than Buick Regal Sportback (2020).
Audi S6 (2018) is 1% lower than Buick Regal Sportback (2020).
Audi S6 (2018) is 8.8% heavier than Buick Regal Sportback (2020).
Audi S6 (2018) is 15.1% smaller in cargo space than Buick Regal Sportback (2020).
Overall footprint
Audi S6 (2018) has a 1.3% larger overall footprint (length × width).
