As for new offerings from Porsche, something based-on-but-smaller-than the Boxster (built on a VW platform, possibly with an inline-four engine), will come in the next year or two.
My test X3 xDrive35i was equipped with a 3.0-liter inline 6-cylinder engine with twin turbochargers, tuned to produce the magic numbers of 300 hp and 300 lb-ft of torque.
The 2.5-liter inline 4-cylinder gas engine and permanent magnet AC synchronous electric motor in the MKZ deliver 191 net horsepower, a modest amount of power for a 3, 752 lb vehicle.