The supercar he was driving was the world's fastest convertible - the Bentley Continental GT - and as the title of this post suggests, 330km/h is the record that was set.
As you might assume, certain necessary modifcations were done to the Bentley to make it suitable for the freezing conditions, which dipped as low as -30C. These included installing Pirelli winter tires, a rear parachute, and a roll-cage.
Only 4.8 km was needed before hitting the record speed on the 16.5 km course. A representative with Guiness World Records was on hand to verify the achievement.
For those interested in seeing the video, (which I think is pretty goddamn awesome) here it is: