Cars and TransportationDownsizing at 290 km/h - Porsche 718 Boxster GTS04:25This browser does not support the video element.Cars and Transportation05/22/2018May 22, 2018A 4-cylinder Porsche with a top speed of 290 km/h may be different, but the 718 Boxter GTS does the job. To meet environmental regulations, it sports a turbocharged 2.5-liter boxer engine. But there's still power aplenty: 269 kilowatts.Copy linkAdvertisement