Audi A7 Sportback (2016) is 548 mm (21.57 inch) longer, 180 mm (7.09 inch) higher and has 309 liters (10.91 ft3) bigger cargo space than Audi R8 (2018).
Audi R8 (2018) is 32 mm (1.26 inch) wider and 175 kg (386 lbs) lighter than Audi A7 Sportback (2016).