All Boxster/Cayman models benefit from direct injection, the technology that's raising compression ratios throughout the automotive world, bestowing greater power and efficiency to engines so equipped (as well as tighter control of fuel flow, and thus a cleaner emissions profile). The base models receive a 2.9-liter horizontally-opposed (flat) six-cylinder, whereas the S models feature a 3.4-liter version. The 2.9 sings a sweet 255 horsepower out of the central-mounted exhaust outlet in the Boxster; 265 in the Cayman. The Boxster S adds 55 hp to that for a total of 310; 320 in the Cayman S.
More tech comes in the form of Porsche's first dual-clutch automated manual dubbed PDK, a 7-speed unit that gives lighning-quick shifts, automatic or driver-selected shifting, and impressive economy due to a tall 7th gear for highway cruising. This gearbox is available on all models, and goes by the wonderfully Germanic name Porsche-DoppelKupplungsgetriebe. Additionally, larger brakes - and LEDs for the taillights that indicate their application - make their way onto all '09s.
[source: Automotive News]