Tornado Racer is a racing car used by Miles "Tails" Prower in Sonic & Sega All-Stars Racing. It is a yellow plane that is built as a land-based version of the Tornado. According to the game's website, it is built with parts found after an attempted invasion by Dr. Eggman.
In the game, Tails with his Tornado Racer is capable of making fast turns with its short wing span. It has a special move called the Tails Tornado capable of removing other vehicles and items on the path in front of him by summoning a miniature cyclone.
The Tornado Racer's engine output most likely was limited on purpose by Tails as if it were faster it would fly like a normal plane. The Tornado Racer has enough speed to hover over the ground, so its power was limited just enough, also if it gets launched off of a hill, it has a very slow descent suggesting its capabilities of flight. Also during Tails' Tornado, the Tornado Racer flies in the air along with the tornado that the move creates.
Tails' All-Star Move is Tails Tornado, where he presses a button on his racing plane and suddenly the plane starts performing a vertical barrel roll, that makes a huge tornado. Tails Tornado is able to pull him forward, while at the same time it sucks up opponents and used items in the tornado's path. After doing it, the Tornado Racer returns to normal driving mode.