25 week of 1991

Circuit/Rally	Championship	Date	Winers	Chassis
Arbis	Motocrossowe Mistrzostwa Świata 250cc	1991.06.23	Alessandro Puzar	Suzuki
Autodromo Internazionale del Mugello	Międzynarodowe Mistrzostwa Formuły 3000	1991.06.23	Alessandro Zanardi	Reynard 91D - Zytek Mugen
Brands Hatch	Formula Vauxhall Championship	1991.06.23	Kelvin Burt
Brands Hatch	Formula Vauxhall Junior Championship	1991.06.23	Jamie Guerrero
Brasília	Brazilian Formula 3 Championship	1991.06.19	Affonso Giaffone	Ralt RT32 - Volkswagen
Circuit de la Sarthe	World Sportscar Championship	1991.06.23	Volker Weidler Johnny Herbert Bertrand Gachot	Mazda 787B
Circuit de la Sarthe	24 Hours of Le Mans	1991.06.23	Bertrand Gachot Johnny Herbert Volker Weidler	Mazda 787B
Donington Park	Brytyjska Formuła 3	1991.06.23	Rubens Barrichello	Ralt RT35 - Mugen-Honda
Goiânia	SudAm Formula 3 Championship	1991.06.23	Marcos Gueiros	Ralt RT33 - Mugen-Honda
Hatherton	Motocrossowe Mistrzostwa Świata 125cc	1991.06.23	Bob Moore	KTM
Knockhill Racing Circuit	Brytyjska Formuła Ford	1991.06.22	Marc Goossens	Van Diemen RF91 - Ford
Misano World Circuit Marco Simoncelli	Italian Superturismo Championship	1991.06.23	Roberto Ravaglia	BMW M3 Sport Evo
Misano World Circuit Marco Simoncelli	Italian Superturismo Championship	1991.06.23	Roberto Ravaglia	BMW M3 Sport Evo
Oulton Park	Brytyjska Formuła Renault	1991.06.22	Jason Plato	Van Diemen RF91 - Renault
Portland	Indy Car World Series	1991.06.23	Michael Andretti	Lola T9100 - Chevy
	CART Indy Lights Series	1991.06.23	Eric Bachelart	March 86A - Buick
	Trans-Am Series	1991.06.22	Irv Hoerr	Oldsmobile Cutlass