Volkswagen Beetle

A Beetle was an Earth car manufactured in the 20th and 21st centuries by Volkswagen.

The Sixth Doctor and Melanie Bush once hired a green convertible Volkswagen Beetle from Bertie's Rent-A-Bug in Australia. Some time later, Mel was surprised to find that instead of returning the car as he'd promised, the Doctor had decided to keep it aboard his TARDIS. Furthermore, he had replaced the car's collapsible roof with one the same colours as his trousers, and added a green sunstrip across the windscreen which read "The Doc" on the driver's side and "Companion of the Moment" on the passenger's side. Mel chided the Doctor for his dishonesty, and talked him into at least repaying Bertie's for the cost of the car. (PDA: Instruments of Darkness)

The Eighth Doctor had a Volkswagen Beetle that fit into an alcove in the TARDIS, which he drove, and let Sam Jones drive, on numerous occasions. (EDA: Vampire Science, Longest Day, Seeing I) The Doctor traded it to a Faction Paradox cultist in 2002 for information. It was supposedly taken back in time and melted down to create the car, thereby creating a paradox. (EDA: Unnatural History)

Mickey Smith drove a Volkswagen Beetle in 2005, but had replaced it with a Mini by 2006. (DW: Rose, The Parting of the Ways)

Sarah Jane used to drive a Volkswagen Beetle called Ethel. It was blown up. (BFSJS: Comeback) Ethel was repaired some time before 2010 — or Sarah Jane bought an entirely different Beetle — in time for Sarah Jane to give her son a yellow Beetle in which to go to university. (SJA: The Nightmare Man)

While living in New York in 1965, Kathy Marchant owned an orange Beetle. (PDA: Salvation)