Next week in Geneva,German tuner Techart will be previewing a 660 hp GTStreet R based on the 2010 Porsche 911 Turbo.
3.8-liter twin-turbo flat-six produces 660 horsepower and 635 lb-ft of torque. That’s 160 hp more than the stock 911 Turbo. 0-100 km/h(62 mph) comes in just 3.5 seconds and the top speed is 214 mph(345 [...]
