A Formula One licensed racing game for the PC Engine and the second game in Nichibutsu's F1 Circus series.

F1 Circus '91 is a top-down Formula One racing game with a strong simulation element. Players kit out their vehicle, take on various prominent Formula One competitors of the era in races that track the vehicle's damage and fuel. Due to the high speeds involved, players need to pay attention to flashing icons that indicate turns coming up in the road.

The game followed 1990's F1 Circus and was followed by 1992's F1 Circus '92. The series would then move to the Super Famicom as Super F1 Circus.