In that 11 I was counting all 'versions' of the ATCC which includes Mercedes, so magic_town has the other 10 correct, though Pete05 had all of the other non-V8 Supercar winners listed.
Pete05 is also correct in Colin Bond only having raced the GTV6 (1985 & 1986) and the 75 (1987), but the race wining Alfa was Ray Gulson in a GTV 2000 at Oran Park in 1974.
This is one of 3 split races in series history. This was before Oran Park was extended to include the figure-8 and the track was just 1.6km in length. 30 cars showed up and the round was split*, with the Over 3L and Under 3L cars all getting their own race.
The other two times this happened was in 1979 at Oran Park, with the U3L race won by Lawrie Nelson in a Capri and in the first round of the 1993 season at Amaroo, with John Doulman winning in a 2L BMW M3.
These races all counted as individual ATCC races, with Gulson, Nelson and Doulman all being credit with individual race wins (I have checked and verified this through every source that I could find, including the relevant Australian Motor Racing Yearbooks).
*I wasn't able to confirm if the two Oran Park split grids were planned that way, or if they were split based on the entries they were receiving. The Amaroo U2L race was planned from the start and the original plan was to have 3 races each weekend, with a 2L race, 5L race and then combined race at the end. However poor turnouts for the 2L class scrapped that after the first round.