Career
Štancl reached the final of the Speedway World Championship on nine occasions between 1971 and 1984, finishing a career best 9th in 1982 in Los Los Angeles Son George also rides. Individual World Championship
1971 - Gothenburg, Ullevi - 13th - 3pts
1976 - Chorzów, Silesian Stadium - 10th - 6pts
1977 - Gothenburg, Ullevi - 14th - 3pts
1978 - London, Wembley Stadium - 15th - 2pts
1980 - Gothenburg, Ullevi - 13th - 5pts
1981 - London, Wembley Stadium - 16th - 3pts
1982 - Los Angeles Memorial Coliseum - 9th - 7pts
1983 - Norden, Motodrom Halbemond - 16th - 1pt
1984 - Gothenburg, Ullevi - 16th - 1pt
World Pairs Championship
1970 - Malmö, Malmö Stadion (with Vaclav Verner) - 5th - 11pts (6)
1972 - Borås (with January Holub I) - 6th - 12pts (7)
1973 - Borås (with Petr Ondrašík) - 6th - 11pts (9)
1977 - Manchester, Hyde Road (with January Verner) - 4th - 17pts (11)
1978 - Chorzów, Silesian Stadium (with January Verner) - 4th - 18pts (9)
1982 - Sydney, Liverpool City Raceway (with Ales Dryml, Senior) - 7th - 8pts (5)
1984 - Lonigo, Pista Speedway (with Ales Dryml, Senior) - 6th - 10pts (5)
World Team Cup
1970 - London, Wembley Stadium (with Zdenek Majstr / Vaclav Verner / Miroslav Verner / January Holub) - 4th - 3pts (0)
1977 - Wrocław, Olympic Stadium - 3rd - 23pts (8)
1978 - Landshut, Ellermühle Stadium - 4th - 18pts (9)
1979 - London, White City Stadium - 3rd - 19pts (6)
1980 - Wrocław, Olympic Stadium - 4th - 12pts (4)
1982 - London, White City Stadium - 4th - 17pts (4)
1983 - Vojens, Speedway Center - 4th - 3pts (2).