The Audi Metroproject Quattro (four-wheel
drive) concept has a plug-in hybrid-electric
power train. A lithium-ion battery pack provides
an electric range of up to 100 kilometers (62
miles) at a top speed of more than 100 km/h (62
mpg). The engine cuts in when the battery’s
charge falls below 20 percent of its maximum.
![Home [Alt + 1]](/images/images/common/nav_home.gif){kind=small}
![Magazine [Alt + 2]](/images/images/common/nav_magazine.gif){kind=small}
![Bioengineering [Alt + 3]](/images/images/common/nav_bioengineering.gif){kind=small}
![Computing [Alt + 4]](/images/images/common/nav_computing.gif){kind=small}
![Consumer [Alt + 5]](/images/images/common/nav_consumer.gif){kind=small}
![Power/Energy [Alt + 6]](/images/images/common/nav_powerenergy.gif){kind=small}
![Semiconductors [Alt + 7]](/images/images/common/nav_semiconductors.gif){kind=small}
![Communications [Alt + 8]](/images/images/common/nav_communications.gif){kind=small}
![Transportation [Alt + 9]](/images/images/common/nav_transportation.gif){kind=small}
