Next-Generation Mazda MX-5 spy shot

At this point, the countdown until the launch of the all-new, fourth-generation 2016 Mazda MX-5 Miata can be measured in hours until its September 3 unveiling as easily as it can in days. With the debut of such a highly anticipated model so close, the rumors about the new sports car are starting to boil over.

We recently heard that the new Miata would likely get a 2.0-liter Skyactiv four-cylinder with a six-speed manual, plus a decent drop in weight compared to the current gen. There's even the rumored possibility of a fastback coupe version sometime in the future.

Now, Australia's GoAuto is adding another dollop of speculation into the mix with the claim that there could be "potentially more engine options," according to Mazda Australia managing director Martin Benders to the website. The more potent option would still be the 2.0-liter Skyactiv with a power bump from its current 167 hp to closer to 200 ponies. The other possible powerplant option would be a 1.5-liter, naturally aspirated four-cylinder taken from the upcoming Mazda2 replacement. This version would also ditch some of the MX-5's more premium features to cut the weight and the price slightly.

"Lightweight rear-wheel drive sportscar offering great value is what we want to return to," said Mazda Australia senior public relations manager Steve Maciver to GoAuto. While such a tiny engine might sound dubious, remember that the original NA Miata performs admirably with just a naturally aspirated 1.6-liter four-cylinder. The potential small-displacement MX-5 might not make it to the US – we'd be a bit surprised if it did, to be honest – but it could still be quite an engaging driver. Besides, it's worth noting that earlier rumors had a 1.5-liter mill pegged as a possibility for the ND Miata.