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.
Meter
mm, cm or m.
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.
That depends what aspect of the car you want to measure: for example its length, volume, mass, weight, color, etc.
miles or kilometers
a tape measure of at least 25 feet or more
I would use centimeters.
feet The meter (m) is the international unit (in SI) for length.
The metre, the yard or the foot.
Centimetres and millimetres. In past times, it would have been feet and inches.
what unit of measure is used when measuring a car
meters