The TopSpeed guys are at it again, this time rendering the 2013 Porsche 911 Turbo convertible.The next generation Porsche 911 has arrived and everyone seems to dig the new, faster German classic. As the new 911 variants continue to shuffle out, we have now seen a rendering the fellas over at TopSpeed have done of what the new 2013 Porsche 911 Turbo convertible could look like.The 2012 Porsche 911 first arrived in coupe form (obviously) and over the past few days, we gotten quite familiar with the cabrio variant.The next form expected off the line from the German automaker is the Porsche 911 Turbo and then the Turbo convertible.TopSpeed has created their rendering by incorporating sportiness to the base 911 and some styling cues lifted from spy shots. The Turbo variant has wider rear fenders, rear spoiler and cooling vents. It is speculated to run on a turbocharged 3.8-liter flat-six with an output of 530hp. Improved fuel economy is also expected for the 911 Turbo convertible. It is expected to arrive shortly after the 911 Turbo coupe, meaning sometime late next summer.Rendering courtesy of Topspeed.