The Kia EV9 should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 505km GT-Line 6 Seats: 5015 mm; 2025 505km GT-Line 7 Seats: 5015 mm; 2025 505km GT-Line 6 Seats: 1980 mm; 2025 505km GT-Line 7 Seats: 1980 mm; 2025 505km GT-Line 6 Seats: 1780 mm; 5 more variants. 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.