The goal of the challenge is to design and build a vehicle that uses the least fuel and produce the fewest emissions possible. Teams can use conventional fuels such as diesel, petrol and LPG, as well as alternative fuels such as solar, electric, hydrogen and biomass can power the vehicles.
Although the vehicles may not be entirely practical, their design provides clues as to some of the features we may one day be seeing on regular production cars. Key elements include a low, aerodynamic profile, downsized engines and bodies, and low rolling resistance tires and drivetrain.