* A fleet of cars: This is probably the most common and widely understood term, especially if referring to a group owned by a company or organization.
* A collection of cars: This is suitable if the cars are being viewed as a group due to their shared characteristics (e.g., a collection of classic cars).
* A convoy of cars: This implies the cars are traveling together, often for a specific purpose.
The word you choose depends on what you want to emphasize about the cars.
