A group of engineers from Oxford University have unveiled a car to compete in an international competition to build energy-efficient vehicles.
Peggie is a light-weight carbon fibre car powered by an electric motor that travels up to 30km/h (18.64mph).
It is entering the European leg of the Shell Eco-marathon 2012 in Rotterdam on 16 May.
Teams will try to use the least amount of energy over the 16.3km (10.1m) street course.
Doctoral student Peter Armstrong, from the university's Electric Power Group, said: "I think we'll probably be up against some stiff competition.
"I'm not making excuses in advance but there will be lots of other factors - driving style, prevailing weather conditions and lots of other things that could have an influence since we are operating right on the margins of what you can get out of this sort of technology.
"So I wouldn't want to be arrogant and assume it's a clean pass for us, but I think we are all quietly optimistic."
The three-wheeled vehicle uses an electric motor that sits in the hub of the wheel and is powered by a lithium-ion battery pack.