Speed enthusiasts are going green fast.

The twin-turbocharged 1,200-hp Viper, called the SVS TTX, set the new world record of 220.7 mph for the standing mile in 27.41 seconds. The standing mile is an acceleration test that clocks a car?s top speed at the end of one mile. The test of the E85 Viper was conducted at the Oscoda-Wurtsmith Airport in Oscoda, Mich. The previous standing-mile speed record of 217.85 mph was held by a vehicle with a gasoline engine.