British inventor Sir James Dyson has announced plans to build an electric car that will be "radically different" from current models and go on sale in 2020. The Guardian reports: The billionaire who revolutionized the vacuum cleaner said 400 engineers in Wiltshire had been working since 2015 on the 2.5 billion British pound project. No prototype has yet been built, but Dyson said the car's electric motor was ready, while two different battery types were under development that he claimed were already more efficient than in existing electric cars. Dyson said consumers would have to "wait and see" what the car would look like: "We don't have an existing chassis [...] We're starting from scratch. What we're doing is quite radical." However, he said the design was "all about the technology" and warned that it would be an expensive vehicle to purchase. While he did not name a price, he said: "Maybe the better figure is how much of a deposit they would be prepared to put down."