Expected to displace 2.5-liters, the four-cylinder engine will be available in turbocharged guise.

New details are starting to emerge about Porsche's four-cylinder engine, which is slated to be launched in an entry-level roadster.

In an interview with Autocar, Wolfgang Durheimer - the outgoing head of research and development - confirmed the engine is under development and could be used in the 2012 Boxster and Cayman. More interestingly, he went on to say it "could be applied, if necessary, to the 911." While this sounds like blasphemy, he added "Our decision is, on the 911 side, we'll stay with the flat [six]. But there are opportunities for the future."

Expected to displace 2.5-liters, the four-cylinder engine will reportedly be unique to Porsche and available in turbocharged guise. While specifications are still pending, the latter variant could produce upwards of 360 hp (268 kW / 365 PS).

In similar news today BMW has announced their all-new 2.0 liter turbocharged 4-cylinder petrol/gasoline engine in the X1 xDrive28.

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Porsche four-cylinder details emerge