He made his debut for England against Wales in 1972 and made a further 15 appearances with his final one being against France in 1978. His 16 caps included four wins, although these were against New Zealand, South Africa, Australia and Wales. Old also played in the famous victory of the North of England over the touring All Blacks at Otley in 1979 with the English regional side running out 21-9 winners.
Old was selected for the 1974 British Lions tour to South Africa but was replaced by Phil Bennett at fly-half after sustaining an injury. He played in only four matches on the tour, scoring a then-record 37 points in the match against South West Districts. His tour was ended by a serious leg injury in the match against the Proteas.
He was often more admired by England fans than by the selectors. On one occasion, a fan was so enraged when a player whom he considered to be inferior was selected in Old's place that he reputedly composed a letter of complaint pointing out the many ways in which Old would have been a better choice and then sent a copy to each member of the selection committee, written in Braille.[citation needed]
After the end of his playing career, Alan Old became a successful educationalist, serving as the Principal of Cleveland Technical College, having already been a master at Worksop College and a mathematics teacher at Myers Grove Comprehensive in Sheffield
Sir William Turner's Grammar School, Redcar during his playing career.