Adam Ferrera, Tanner Foust, Rutledge Wood and The Stig returned as hosts, with ten weekly episodes being broadcast.
Ferrara announced on April 30, 2013 that filming for a fourth season had officially begun,[1] and this series later premiered on September 3, 2013.
[2] The hosts decide to take three expensive supercars on a 3,000 mile road trip across the United States from Lower Manhattan in New York, to Venice Beach in Los Angeles.
Rutledge chose a $280,000 Lamborghini Gallardo LP570-4 Super Trofeo Stradale, Tanner decided on a $320,000 McLaren MP4-12C Spider.
The guys construct homemade convertibles tough enough to survive in America's 49th state and road test them in a series of challenges as they drive from Anchorage to Homer.
Rutledge buys a 1999 Jeep Cherokee Classic which he cuts the roof into three sections in order to be removed, Tanner chooses a 1999 Chevrolet Express which he turns into a Soft-Top Convertible and Adam for the first (and possibly only) time takes a 1999 Toyota Tacoma Xtra Cab which he turns into a Targa Top.
When they arrive at the campsite to prove Tanner's Design is poorly made, Adam and Rut put tuna in the roof which attracts a Grizzly Bear.
To find out, the Top Gear guys select their favorite and compete in a series of challenges as they travel along the Mississippi.
While waiting for the next challenge at a riverbed Adam and Tanner find Rut arriving with 14-inch tires on his Caprice.
He is impressed with its straight-line performance, cornering speeds and G and also the Quality of interior showing how America are now moving into Europeans league by ultimately saying how it is the closest thing to a Porsche 911.
Adam, Rut and Tanner drive three of the bestselling electric cars on a journey through Michigan to determine which is best and showcase some surprising features.
The unusual tests include a reverse high speed challenge, a race indoors, and a stealth mission.
Rutledge praises the car's superior acceleration, cornering, and the interior; which he says was "Like a Spaceship" and "Lifted from the executive bathrooms at Apple headquarters."
Rutledge however while agreeing that American Supercar is still a concept that needs work fell in love with the Saleen and would rather have it to the Lambo.
In the end Tanner praises it as an achievement, not just because of its all in one package but also because it also means of what the big automotive giants can do to push the emblem.
Rutledge, however, claims that since both Adam and Tanner have lost their cars and he still has his, he warns them that they can either admit that he won or stay at the drag strip forever.
In the end they admit defeat and Adam, Tanner, Rut and Mickey leave the drag strip in the Rat Rod.