The following year saw Allan’s greatest triumph at the 1980 Olympics in Moscow where, despite chronic back pain, he qualified for the 100m final in 10.11secs – a new British record.
In the final itself, he faced pre-race favourite Silvio Leonard of Cuba. With seven metres to go, the Scot began an extreme lean which saw his head and shoulder cross the finish line first by three inches, making him the oldest Olympic 100m champion at 28 years 83 days. The 200m was another close affair, with Allan beaten into second place by Mennea.
After his Olympic glory, Allan won further 100m golds at the IAAF World Cup and European Cup in 1981. In the same year, he also won the Golden Sprint title, which measured aggregate 100m and 200m race times to prove he was the fastest runner in the world.