Craig Henderson and Bill Green said the drive from the Canada-Washington border to the Washington-Oregon border on Interstate 5 in the car they designed, named the Avion, set a new record for fuel efficiency, KPTV, Portland, Ore., reported Monday.

Green and Henderson said a prototype version of the Avion, which is named after the French word for airplane, averaged 103.7 miles per gallon during a drive in 1986. However, they said the accomplishment has only recently drawn attention due to the current interest in fuel-efficient cars.

They said the aerodynamic design of the vehicle means it can reach speeds of more than 100 mph with only 3 to 6 horsepower.

Henderson and Green said the Avion is scheduled to go into limited production soon to allow consumers to purchase their own super-efficient cars.