ARG said Sunday's "expansive coverage", which included the full 6 Hour enduro and the final Supercheap Auto TCR Australia race, was viewed by an average national audience of 163,000 people on 7mate, with a peak audience of 276,000.

It says the total audience reach for the broadcast was 720,000 people.

ARG said a record 16 hours of coverage from Bathurst was shown across 7mate and 7plus on Saturday and Sunday.

"As well as the broadcast on the Seven Network, the race was also seen by a global audience watching on Sky Sports New Zealand and streaming via motorsport.tv, as well as the TCR and GT World Challenge's category channels," an ARG spokesperson said.

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The spokesperson said more than one million people were reached by both the event and key category social media channels, "with more than a quarter of a million digital video views ... across the event period".

"The numbers make this year's event comfortably the most viewed Bathurst 6 Hour and Shannons Motorsport Australia Championships event yet," the spokesperson said.

The event last weekend was blessed with sunny weather and attracted an official crowd of 15,000 people over the three days of racing.

ARG CEO Matt Braid was happy with the figures.

"Having this high average number of viewers retained for the length of the broadcasts is very encouraging and indicates that we are on the right track with the racing categories and their entertainment value, plus the high standard of our broadcast," he said.