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Which car has the least air resistance?

The car with the least air resistance is the Volkswagen XL1. It has a drag coefficient of 0.189, which is the lowest of any production car. This low drag coefficient is achieved through a number of design features, including:

* A streamlined shape with a narrow frontal area

* A smooth, contoured surface with few protrusions

* Active aerodynamics, such as a movable rear spoiler, that adjust to reduce drag

* Wheel covers that help to smooth airflow around the wheels

The Volkswagen XL1 is a plug-in hybrid electric car that can travel up to 31 miles on electric power alone. It has a top speed of 99 mph and a fuel economy of 261 mpg.