This air-powered, life-size, lego car is brilliant or insane or both. First of all, just look at it! It is made of more than 500,000 Lego pieces. The entire engine is made of Legos, has 256 pistons and it runs on air pressure. It can attain a top speed of 20 MPH. Apparently some of the load bearing parts, tires and the drive train aren't made of Legos, so if you are making a pure Lego car, you don't need to worry about this project. Still, the engine in particular is quite an achievement. Well done Steve Sammartino and Raul Oaida. See the video to watch it move.
What other little bits of informations there are can be found at SuperAwesomeMicroProject.