What unit of measure would you use to a car?

* Length: Meters (m) or feet (ft)

* Width: Meters (m) or feet (ft)

* Height: Meters (m) or feet (ft)

* Weight: Kilograms (kg) or pounds (lbs)

* Engine displacement: Liters (L) or cubic centimeters (cc)

* Fuel economy: Kilometers per liter (km/L) or miles per gallon (mpg)

* Speed: Kilometers per hour (km/h) or miles per hour (mph)

There's no single "unit" for describing a car as a whole. It depends on the specific characteristic being measured.