Touted as one of the the biggest milestone in Red Bull's history, Project X1 is set to be a big draw-card for Sony's already awesome looking racing game Gran Turismo 5.

The Gran Turismo development team at Polyphony Digital posed the simple question, "If you built the fastest racing car on land, one that throws aside all rules and regulations, what would that car look like, how would it perform and how would it feel to drive?" With the assistance of Red Bull Racing's technology, Polyphony Digital were able to produce the answer in the form of the X1 Prototype which will be playable in Gran Turismo 5.

Red Bull's aerodynamics expert, Adrian Newey, performed the role of technical advisor on the X1 Prototype project. Newey is renowned in the motorsports world for designing championship winning cars. Throughout the X1 design process by Polyphony, Newey contributed his vast experience, as well as a pure, child-like technical curiosity. As a result, the completed X1 Prototype became an extreme car, having a unique form and mechanism unlike any other racing car in history.

Steve has already given us the new GT5 details direct from Tokyo, and now we have a couple of teaser-trailers for you to check out.

The X1 Project:



And some of the action from GT5: