Holmes' Motor Car is a vintage automobile with seating for two to four people.
Sherlock Holmes and John H. Watson emerged from a subway station in the motor car in search of James Moriarty. Watson later used the motor car to block a guillotine blade hurled at the Ghostbusters. Holmes later summoned it when Winston Zeddemore agreed to be his guide. However, the car vanished when they pulled up the New York City Public Library, where Moriarty was absorbing all evil in the vicinity.
The motor car can solidify and become intangible when the situation dictates it. If a human is riding in the car, he or she will also be intangible and able to pass through walls. After passing through walls, the car leaves behind ectoplasm.
- On page 14 of Ghostbusters Volume 2 Issue #14, Holmes' Motor Car makes a non-canon cameo as one of the floating vehicles.
- On page three of Ghostbusters International #7, in panel 1, there is non-canon reference on the car rental sign to Y-Car in the bottom right.