Porsche says it will reach a target of selling more than 200,000 vehicles a year in 2015 or 2016, about three years earlier than initially planned.
Investments in expanding and modernising factories in the region around its Stuttgart, Germany, hometown will exceed €1 billion by 2018, and the manufacturer plans to decide on a new model line next year, chief executive officer Matthias Mueller said.
Porsche accounted for €1.29 billion ($2.13 billion) of group first-half operating profit of €5.78 billion, the third-largest earnings contributor after the Audi premium unit and the mass-market VW car nameplate.
Europe's debt crisis is far from over, and "the political and economical framework conditions worldwide bear significant uncertainties," Mueller said.
Porsche, which ranks first at Volkswagen in terms of profit per vehicle, plans to expand its sales network 33 per cent by 2018 as demand for upscale vehicles jumps in emerging markets such as China and the division adds models.