R&T only cites "sources familiar with the project," which claim that turbocharged flat-sixes will be at the core of the 992's engine range, alongside a plug-in-hybrid model. A four-cylinder 911 remains unlikely.
What's most surprising, though, is how soon Porsche will introduce a turbocharged base-car lineup. Road & Track claims the blown flat-sixes will be added as part of a facelift coming before year's end. Perhaps unwilling to risk the further ire of purists, the current car's seven-speed manual transmission will continue to be sold, alongside the company's excellent PDK automatic transmission.
As for when this facelift will happen, the 2015 Frankfurt Motor Show in September seems like the most obvious date.