The Andretti Autosport Formula E team will revert to the championship's season-one powertrain in the 2015-'16 campaign.The American squad formed Andretti Technologies to develop its own motor and inverter for the ATEC-01, which uses a revised four-speed Hewland gearbox. However, a troubled testing program – which ends today – has...

The Andretti Autosport Formula E team is confident it has solved the problems that have blighted its pre-season testing program with its new powertrain.Simona de Silvestro has failed to complete a single timed lap across the two tests, with myriad problems disrupting the team's progress over the four days at...