The BMW i4 should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 eDrive35 Basic line: 4783 mm; 2025 eDrive35 Basic line: 1852 mm; 2025 eDrive35 Basic line: 1448 mm; 2025 eDrive35 Basic line: 2856 mm; 2025 eDrive35 Basic line: 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.