The Fantasti-Car MK II was designed and maintained almost entirely by Johnny Storm and used by the Fantastic Four. It has seen many upgrades and refits over the years. When Dr. Doom took control of the Baxter Building, he used it against the Fantastic Four, destroying it in the process. Reed Richards presumably repaired it afterwards.
The Fantasti-Car's maximum level flight airspeed is 550 miles per hour with all four members of the Fantastic Four on board. Maximum altitude of 30,000 feet. The twin mini-planes can each detach and fly independently of the mother craft, or by radio control. They are stowed on board with one wing up. The mini-plane are released and captured by an articulated arresting arm that holds them until they are either ready for stowage or flight. Their maximum level-flight airspeed is 350 miles per hour, their normal service ceiling is 38,000 feet.
The Fantasti-Car resembling it's MK II equivalent was designed by Reed Richards. Like it's comic version the vehicle can separate into four flyingmodules for each FF member.