what is the fastest roller coaster in the world

The fastest roller coaster in the world is Formula Rossa, located at Ferrari World Abu Dhabi. It reaches a top speed of 240 km/h (149.1 mph) in just 4.9 seconds using a hydraulic launch system. Riders experience up to 1.7 g-force during acceleration and up to 4.8 g throughout the ride. Formula Rossa surpassed Kingda Ka at Six Flags Great Adventure as the worlds fastest roller coaster when it opened in 2010.