Second generation Audi S1 EKS RX quattro celebrates premiere Mattias Ekström targets third successive Barcelona victory Moment of truth for Audi factory driver Mattias Ekström and his team in Spain: the fifth World Rallycross Championship season commences at the Circuit de Barcelona-Catalunya on April 14–15. And the new Audi S1 EKS RX quattro makes its competitive race debut. To start the World RX season, the EKS Audi Sport squad must assert itself against the teams from ...