The Volkswagen Eos, BMW's M6 Convertible, Volvo's second-generation C70 and the Alfa Romeo Spider all debuted at the Show.
"Australia's deepening love affair with convertibles reflects the strong growth of the market segment," says FCAI chief executive Peter Sturrock.
"The Australian International Motor Show is the perfect forum for the latest convertibles to hit our shores - to showcase to the public their individual advances in technology, styling and performance," he said.
Volkswagen is setting a world first with its new Eos - a four-seater with a five-section CSC hardtop convertible roof.
Together with its length and height, the vehicle's width lends the Eos a powerful stance that contributes to the car's extra agility and safe handling.
Another four-seater to be revealed at the motor show is BMW's M6 Convertible, featuring its internationally acclaimed five-litre V10 engine.
Producing a massive 373kW, the M6 engine accelerates from 0-100km/h in 4.8 seconds.
The M6 Convertible has the same performance package as its coupe counterpart in addition to the styling cues that clearly identify it as the work of BMW.
Volvo's much anticipated second-generation C70 convertible, to be unveiled for the first time in Australia at the motor show, features a three-piece folding hardtop, which converts the car from coupe to convertible in less than 30 seconds.
The new C70 offers comfortable interior space and world-first safety for four passengers.
The motor show will also see the return of the Alfa Romeo Spider in a new-generation form.
The rear of the new version of the classic two-seater sports car has been redesigned to focus attention on its open-top character.