feet The meter (m) is the international unit (in SI) for length.
meters
You would measure the length of a car in metres. An average car is about 4m
a tape measure of at least 25 feet or more
That depends what aspect of the car you want to measure: for example its length, volume, mass, weight, color, etc.
You would measure the length of a car in metres. An average car is about 4m
Kilometer would be the best unit to measure the length of a car, as the length of a typical car is usually in the range of a few meters, making meters too small a unit for practical measurement.
To measure a car's length, I would try yards or feet. Maybe both. It mostly depends on the legnth of a car. A stretch limo would use yards while a VW Bug would probably be feet. For an average car, though, yards.
The metric measurement that is the best estimate for the length of a car is typically in meters or centimeters. This allows for a more precise measurement compared to using larger units such as kilometers.
dekameter. a car would be about .39 of a dekameter in length, as opposed to thousands of mm
centimeters
A metre - unless you were writing up the car's specifications.