The Renault Megane should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2021 1.8T R.S. 300 Trophy: 4364 mm; 2021 1.8T R.S. 300 Trophy: 1875 mm; 2021 1.8T R.S. 300 Trophy: 1447 mm; 2021 1.8T R.S. 300 Trophy: 2672 mm; 2021 1.8T R.S. 300 Trophy: 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.