The P50 is built by the Peel Engineering Company, and currently holds the record of being the world's smallest production car. It is powered by a moped engine, only has three wheels, and is barely able to get past 30 MPH.
The P50 is 54 inches long and 41 inches wide. It is light enough that it can be easily be lifted up by one person in the back and carried where it can't be driven normally.