270 mph!

[Garin]

Watch the World?s Fastest Car Hit 270 MPH: Everything in the Video Is Awesome | Video | TheBlaze.com

[mkjeeves]

A lot of that car looks really familiar...

From the Hennessey website:

Note: The Hennessey Venom GT design is based on the Lotus Elise / Exige. The Venom GT is created from a base Lotus Elise / Exige and utilizes components including but not limited to the roof, doors, side glass, windscreen, dash, cockpit, floorpan, HVAC system, wiper and headlights.

[Urban Pioneer]

Very cool.

[Snowman]

Apparently fastest for a relatively conventional high end sports car, the fastest car has hit 760.343 mph (supersonic). Though it is not something that could be driven on the road; it was pretty much two massive jet engines, with the fuel supply and driver in an aerodynamic shell between the engines.