18 week of 1991

Circuit/Rally Championship Date Winers Chassis
Italy Autodromo Nazionale di Monza World Sportscar Championship 1991.05.05 Jaguar XJR-14
Germany AVUS Niemiecka Formuła 3 1991.05.05 Eufra 390 - Mugen
DTM 1991.05.05 Audi V8 quattro DTM
1991.05.05 Audi V8 quattro DTM
Brazil Cascavel Brazilian Formula 3 Championship 1991.05.05 Ralt RT32 - Volkswagen
SudAm Formula 3 Championship 1991.05.05 Ralt RT32 - Volkswagen
Japan Fuji Speedway All-Japan Formula 3 1991.05.04 TOMs 031F - Toyota
All Japan Sports Prototype Championship 1991.05.05 Nissan R91CP
United States Heartland Park IMSA GT Championship 1991.05.05 Nissan NPT-91
Italy Magione Italian Formula 3 Championship 1991.05.01 Ralt - Alfa Romeo
Austria Schwanenstadt Motocrossowe Mistrzostwa Świata 250cc 1991.05.05 Honda
United States Sears Point Trans-Am Series 1991.05.05 Oldsmobile Cutlass
United States Topeka USAC National Formula Ford 2000 1991.05.05 Swift DB-6 - Ford
Italy Vallelunga Italian Formula 3 Championship 1991-05-?? Dallara - Volkswagen
Sweden Vissefjarda Motocrossowe Mistrzostwa Świata 500cc 1991.05.05 KTM
Belgium Zolder Formuła Opel Euroseries 1991.05.05 Lotus 17 - Opel
France Rajd Korsyki World Rally Championship 1991.05.01 Toyota Celica GT-4
FIA Cup for Production Rally Drivers 1991.05.01 Renault 5 GT Turbo
Italy Rajd Targa Florio Sycylii European Rally Championship 1991.05.05 Lancia Delta Integrale 16V