The BMW X5 should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 xDrive40i M Sport: 4935 mm; 2025 xDrive40i M Sport: 2004 mm; 2025 xDrive40i M Sport: 1765 mm; 2025 xDrive40i M Sport: 2975 mm; 2025 xDrive40i M Sport: 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.