The average width of a car is around 1.9 meters which is 5.8 feet. Car widths can vary due to aerodynamic improvements or additional safety features. The smallest car in the country is the Chevrolet Spark. It is just 1.58 meters wide. The Tesla Model X is the widest non-ultra-luxury car, when its side mirrors are folded in. It is about 2.25 meters. Side airbags and lane departure sensors can increase a car's width.