The XPeng P7 should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2026 Standard: 5017 mm; 2026 Standard: 1970 mm; 2026 Standard: 1427 mm; 2026 Standard: 3008 mm; 2026 Standard: 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.