Lucas di Grassi became the first driver to duck under the 1m 29s barrier on day four of pre-season testing at Donington Park.

On day three his Abt Schaeffler team-mate Daniel Abt broke the testing lap record at the Leicestershire circuit and was confident his squad could find further gains to break the 29-second mark, which di Grassi duly did on day four with a 1m 29.920s using the 200kW qualifying mode.

"I have to say that going for the time is not as important as working on the reliability of the car," said di Grassi. "Of course working on the performance is important, but we know that performance here doesn't necessarily translate to what we will see at the other tracks."

Renault e.dams driver Sebastien Buemi claimed second place on the day four timesheet but says his team were focusing purely on race simulations through the day by running at 150kW rather than hunting one lap pace.

"We trust our people and our system and we will work hard to get the most out of the car for the rest of testing," Buemi said. "Clearly we don't want to show our hand but you also need to experience what you are capable of doing. You try to play the game and see what happens."

Bruno Senna ended the day third fastest for Mahindra Racing ahead of his team-mate Nick Heidfeld, while GP2 Series race winner Nathanael Berthon enjoyed his first session in a Formula E car for Team Aguri.

Nicolas Prost rounded out the top five ahead of Jean-Eric Vergne, Jerome d'Ambrosio, Berthon, Stephan Sarrazin and Jacques Villeneuve.

Both Andretti Amlin and Trulli continued to be hampered with technical issues with neither team setting a timed lap, which will be a cause for concern just a week until next week's test remaining ahead of the 2015-16 season opener in China.

The final pre-season test takes place at Donington Park on August 24 and 25.



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