The longest car in the world measures 30.5 meters

A 30.5 m (100 ft) long 26-wheeled limousine designed by Jay Ohrberg of Burbank, California, USA is the longest car in the world. It features among others a swimming pool with diving board and a king-sized water bed.

It is designed to drive as a rigid vehicle or it can be changed to bend in the middle. Its purpose was for use in films and displays.