Austin Coulson of Phoenix, Arizona signed into Guiness World Record book with his smallest road-legal car. It has a top speed of 25 mph, and carries the license plate “IM BIG”. The car measures just 4 ft 1.75 long, 2 ft 1.75 in wide and 2 ft 1 in high. It’s made,more-or-less, from scratch, including the frame.