From Wikipedia ...
And some people ask why I chose a Roadster.
This coaster has some distinctive features. It uses Linear Induction Motor, to launch the train up the first hill, replacing the traditional lift hill chain. This coaster is one of Disney's fastest attractions, accelerating guests from zero to 55 miles per hour (89 km/h) in four seconds at the launch.
And some people ask why I chose a Roadster.