- 36,817
- Scotland
- GTP_daan
AutosportFormula 1 did not adopt a regular numbering system until early in 1973, when car numbers were awarded based roughly on the constructors' standings.
Those numbers became 'permanent', with only the team running the champion driver changing for the following year and assuming #1 and #2 for its cars. The team previously holding #1 then took the numbers left vacant by the new #1 runner.
This system was maintained until 1996, when the present numbering method based on annual constructors' championship positions took effect.
http://www.autosport.com/news/report.php/id/111651
and
The #1 has not always been associated with the World Champion driver. Many men who
were the season’s reigning champion have raced under different numbers – and not always
with the same number all season long.
In fact the first man to win a World Championship Grand Prix in a car carrying #1 was,
perhaps inevitably, Juan Manuel Fangio, who made a habit of winning – 25 times in a Grand
Prix career lasting from 1950 through 1958.
Not until the 40th race of his 51-race F1 career, however, did the #1 grace his car: a Lancia
Ferrari D50 with which he won the British Grand Prix in 1956.
In the Championship’s first decade, the #1 won races only five times; in the Sixties that
number rose to 11; it increased steadily as the practice of giving that number to the reigning
World Champion for the entire season following his title success became established.
The #1’s success reached dizzy heights in the 21st century, though, thanks to two Germans. In
the 14 seasons to date, #1 has been the race-winner on no fewer than 84 occasions, helped
considerably by seasons like 2004 and 2013 – when Michael Schumacher and Sebastian
Vettel each scored 13 Grand Prix wins.
http://www.fia.com/sites/default/files/external_archive/node6948/AGP1050_2014_F1_Media_Kit_A4.pdf