British magazine car has the details, and if its sources are correct, the 2012 Boxster and Cayman twins will feature all-new underpinnings - and eventually a smaller engine.
The cars will go up in size, their wheelbase growing by 60mm and overall length by 37mm. Height will reportedly fall by 10mm however, and the front overhang has also been cut by 25mm.
Despite the larger overall size, the report claims that weight will fall by 15kg to 1320kg (for the Boxster).
The German brand is reportedly developing a unique, less traditional look for the new '981' Boxster, including a headlight and tail-light design that moves away from the 911-inspired look of the 986 and 987 generations.
The 2.9 litre engine of the current model is expected to carry over into the new Boxster, with power increased from 188kW to nearly 200kW.
Come 2015 however, the flat-six engine will reportedly be replaced by a new twin-turbo 2.5 litre four-cylinder boxer engine, developing around 270kW and 470Nm of torque.
The report adds that hybrid and diesel versions are also on the cards, although management has yet to approve either for production.
The new Boxster is expected to make its international debut at January's Detroit Auto Show.