The Audi SQ8 Sportback e-tron should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 471km quattro: 4915 mm; 2025 471km quattro: 1976 mm; 2025 471km quattro: 1617 mm; 2025 471km quattro: 2928 mm; 2025 471km quattro: 5. Wheelbase and seating matter most day to day because they influence rear-seat comfort, child-seat friendliness and how relaxed the car feels on longer trips.