Kia has designed its KV7 concept to showcase its vision for the large MPV sector, particularly in the US.Revealed at the Detroit motor show, the Californian-penned "convention-challenging” show car is nearly 4.9m long and more than two metres wide. Its most striking feature is a gullwing passenger-side door.See the Kia KV7 concept - now updated with Detroit show picsThe car is powered by Kia’s