Most vehicles that race are based upon European or Japanese hot hatches, although compact cabriolet cars such as the Vauxhall Tigra are also widely used.
The World Championship race for the National Hot Rods is staged at the annual spedeweekend at Foxhall Stadium in Ipswich, which is traditionally held during the first weekend of July each year.
Their annual World Championship race is held at various tracks in England and Scotland, With every third running being staged at either of the two Spedeworth-sanctioned tracks (Tullyroan Oval or Aghadowey Oval) in Northern Ireland.
Later years have seen the event take on a more domestic focus, although frequently featuring European and South African representation where the formula also race.
As the sport developed across the country in the 1970s there was some confusion as drivers from different regions and promoters found themselves racing with the same numbers.