A motor sport expert has dismissed a leaked calendar showing Adelaide as a host city for a breakaway Formula One competition.

British media reports say a leaked calendar of the proposed rebel championships would start next year in Buenos Aires and end in Adelaide.

The leaked calendar lists 17 race venues but does not include Melbourne.

The Formula One Teams Association has proposed the rival competition in a dispute with the sport's peak body, the FIA.

Motor racing consultant Mike Drewer says the calendar is based on speculation.

"Not surprisingly Adelaide because it was very, very popular when it had Formula One," he said.

"Adelaide's been listed on a theoretical calendar but it's a bit like trying to work out who might be the members of a cabinet if there was a change in government, a lot of journalists have got around and had a bit of a stab at it."

The Confederation of Australian Motor Sport has also cast doubt on the calendar.