The Aston Martin DBX should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 707 4.0T Standard: 5039 mm; 2025 S 4.0T Standard: 5039 mm; 2025 707 4.0T Standard: 1998 mm; 2025 S 4.0T Standard: 1998 mm; 2025 707 4.0T Standard: 1680 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.