Porsche will decide by 2015 whether it will discontinue diesel engines , said CEO Oliver Blume . Currently , diesel engines account for about 15 % of the car maker 's global sales . At luxury rival BMW (BMWG.DE), diesel cars make up 35 percent of new registrations while Audi’s Over the next 10 - 15 years , Porsche will offer a range of combustion engines , plug - in hybrids and battery - only vehicles , Blume said . Battery - only vehicles could account for between 15 - 35 % of sales by 2025 , he added . Last year , German prosecutors investigated whether staff at Porsche were involved in designing software that produced false readings of diesel emissions . Investigators are also examining whether Porsche 's Cayenne sedan was fitted with a " defeat valve " .
Porsche will decide by 2015 whether it will discontinue diesel engines , said CEO Oliver Blume . Currently , diesel engines account for about 15 % of the car maker 's global sales . Over the next 10 - 15 years , Porsche will offer a range of combustion engines , plug - in hybrids and battery - only vehicles , Blume said . Battery - only vehicles could account for between 15 - 35 % of sales by 2025 , he added . Last year , German prosecutors investigated whether staff at Porsche were involved in designing software that produced false readings of diesel emissions . Investigators are also examining whether Porsche 's Cayenne sedan was fitted with a " defeat valve " .