Eight brands including Alfa Romeo, Audi, Honda, Hyundai, Opel/Holden, Renault, Subaru and Volkswagen were presented on the grid with Honda and Renault offering minor support to Wall Racing and Garry Rogers Motorsport respectively.
Deemed a success by its promoters the Australian Racing Group (ARG), the focus has moved to increasing the grid size this season, having originally capped it at 20 entries, with 30 cars a target for 2020.
ARG has invested significantly in bringing the series to life in some cases has offered support to teams to assist plans to join the series.
However, ARG non executive director and former Supercars boss James Warburton expects more cars to join the series this season with grid density key to growing the series' platform.
Warburton has joined ARG in a part-time role where he is expected to assist in strategic discussions and advertising and marketing negotiations for TCR Australia.
“Week 1 is actually about a proof point,” said Warburton, who attended the opening round at Sydney Motorsport Park.
“A lot of people were on the fence, and it's really about starting.
“Joining Shannons is a really good opportunity, it's predominately been a competitors event. It's really about getting everything underway and enjoying the championship over the Shannons rounds – and then building towards 2020.
“I think the absolute focus of the championship is, TCR works on grid density.
“So we worked really hard to get the 18 cars we wanted (for the opener), and we got 17.
“The focus is to get into the 20s and end the year in the mid-to-late 20s.
“Then the ambition is to have 30 cars on the grid by 2020. That's where we think things will really start to roll.
“Lots of competitors spoke to us (over the Sydney weekend), there's lots of people watching.
“It's really building that calendar that is a really attractive calendar going forward.”
It is a view shared by Confederation of Australian Motor Sport CEO Eugene Arocca, who believes more cars are on the way, although only 18 machines are currently in the country at present.
“We were happy with the start up grid of 14 to 16, it's fantastic, but this grid's got capacity in my view to get up to 25, 26 cars,” he said.
“There's no reason as it progresses, and builds its momentum that's not unachievable.
“There's certainly more discussions going and you saw how quickly it sort of fell into place in the last month with drivers being announced, so there's more cars coming, I'm pretty confident by the start of 2020 if there's not 20 cars on the grid I'll be surprised.”
Wall Racing has already signalled its intention to expand its operation which currently runs a pair of Honda Civic Type Rs for Tony D'Alberto and John Martin.
“It is very likely that we will expand beyond our two current cars,” said team owner David Wall.
“The maximum number of cars you can run per marque is five, and there's no reason we couldn't run three, potential four in the near future.
“The interest increased when Tony put the car on pole and we had the second and third fastest laps (in Race 1) in race trim.
“The product is obviously good enough and they sell themselves.
“The series is new, but there has been an increase in people wanting to be involved in some way, shape or form. Hopefully we can grow our team in the near future.”
TCR Australia will head to Phillip Island for Round 2 from June 7-9.