Hmm...
Yeah I guess
I really dont know much about cars...other than a lil bout engines and shit...
But back to the Tomahawk bike...yeah the engine it has is a Viper SRT-10 engine. Think of the way they put a Viper motor into the Dodge Ram SRT-10...except into a bike.
http://motorcyclecity.com/Concept/Dodge_Tomahawk.htm
Link to prove it. And according to that, an estimated 400 MPH...