15 week of 1991

Circuit/Rally	Championship	Date	Winers	Chassis
Buenos Aires	SudAm Formula 3 Championship	1991.04.14	Affonso Giaffone	Ralt RT32 - Volkswagen
Circuit de la Sarthe	FIM Endurance World Championship	1991.04.14	Rachel Nicotte Philippe Monneret Bruno Bonhuil	Yamaha
Fuji Speedway	Japońska Formuła 3000	1991.04.14	Kazuyoshi Hoshino	Lola T91-50 - Mugen
Hockenheimring	Niemiecka Formuła 3	1991.04.14	Wolfgang Kaufmann	Dallara F391 - Opel
	DTM	1991.04.14	Steve Soper	BMW M3 Sport Evolution
	DTM	1991.04.14	Steve Soper	BMW M3 Sport Evolution
	Formuła Opel Euroseries	1991.04.14	Pedro Lamy	Lotus 17 - Opel
Lédenon	French Formula 3 Championship	1991.04.14	Christophe Bouchut	Ralt - Volkswagen
Long Beach	Indy Car World Series	1991.04.14	Al Unser Jr	Lola T9100 - Chevy
	CART Indy Lights Series	1991.04.14	Eric Bachelart	March 86A - Buick
	Mistrzostwa Toyota Atlantic	1991.04.14	Jimmy Vasser	Swift DB4 - Toyota
	IMSA GT Championship	1991.04.13	Steve Millen	Nissan 300ZX
Magione	Italian Superturismo Championship	1991.04.14	Roberto Ravaglia	BMW M3 Sport Evo
Magione	Italian Superturismo Championship	1991.04.14	Emanuele Pirro	BMW M3 Sport Evo
Oulton Park	Formula Vauxhall Championship	1991.04.13	Kelvin Burt
Payerne	Motocrossowe Mistrzostwa Świata 500cc	1991.04.14	Kurt Nicoll	KTM
Silverstone Circuit	Brytyjska Formuła Renault	1991.04.14	Jason Plato	Van Diemen RF91 - Renault
Snetterton Motor Racing Circuit	British Touring Car Championship (BTCC)	1991.04.14	Will Hoy	BMW M3
Suzuka International Racing Course	World Sportscar Championship	1991.04.14	Mauro Baldi Philippe Alliot	Peugeot 905
Vallelunga	Międzynarodowe Mistrzostwa Formuły 3000	1991.04.14	Alessandro Zanardi	Reynard 91D - Zytek Mugen
Varano	Swiss Formula Three Championship	1991.04.14	Jo Zeller	Ralt RT34 - Alfa Romeo
Rajd Costa Smeralda	European Rally Championship	1991.04.12	Juha Kankkunen	Lancia Delta Integrale 16V