Wha government imposed barriers stop or hinder the export of automobiles?

Question

Vehicles equipped with a high horsepower motor use more fuel then most motors. What does the federal government impose on these vehicles?

Answer 1

Governments impose excise taxes and tariffs and duties on goods produced in other countries. Thus, the cars we make are much more expensive in other countries because of the tariffs charged in imported goods.

The U.S. government imposes a "gas guzzler" tax on new vehicles that use more fuel than allowed.

http://www.fueleconomy.gov/feg/info.shtml#guzzler