Nilsen came to prominence in 1984, when he won the
Swedish U21 championship and finished second to
Per Jonsson at the
1985 European (World) Under-21 Championship final in
Abensberg, West Germany. It was in 1985 that he started racing in the British leagues after signing for
Swindon Robins for the
1985 British League season. Nilsen impressed when as a 19-year he finished 4th in the
1986 World Final (his first World Final appearance) at the
Silesian Stadium in
Katowice, Poland. Nilsen topped the Swindon league averages in 1987 and finished fourth again at the
1987 World Final at the
Amsterdam Olympic Stadium in the Netherlands. In 1988, he won a bronze medal in the
1988 Speedway World Team Cup and reached the final of the
1988 Speedway World Pairs Championship final and the following season won a silver medal in the
World Pairs with
Per Jonsson in the
1989 Speedway World Pairs Championship and a bronze medal at the
1989 Speedway World Team Cup. Nilsen finished 5th in the
1990 Individual Speedway World Championship in
Bradford, England (won by Jonsson). Also in 1990 after appearing in a "Rest of the World" team in a test against
Australia at the
North Arm Speedway in Adelaide, Nilsen won the inaugural running of the Jack Young Memorial Cup, named in honour of
Jack Young. At the end of the 1990 season and despite being named rider of the year, Nilsen left Swindon on loan to ride in the
Berwick Bandits team for the 1991 season. Nilsen finished 5th at the
1991 Individual Speedway World Championship final at
Ullevi in
Gothenburg and won silver medals in the
1991 Speedway World Pairs Championship, with
Henrik Gustafsson and the
1991 Speedway World Team Cup. The following season in 1992, Nilsen won another silver medal at the
1992 Speedway World Team Cup and finished 7th in the
1992 Individual Speedway World Championship at the
Olympic Stadium in Wrocław, Poland. Nilsen was
Swedish Champion in 1996. Nilsen later qualified for the
Speedway Grand Prix in
1997,
1998,
1999,
2000 and
2001, finishing a career best 2nd in 1998 behind countryman
Tony Rickardsson. == World Final Appearances ==