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Lucas di Grassi has grabbed Audi top spot honours at the end of the Le Mans test day ahead of the Porsche LMP1 pair, with Toyota finding gains to make it a tightly-contested three-way manufacturer battle.

di Grassi's best time of 3m 21.375s when track conditions were at the optimum saw him place the Audi 0.895s up on reigning World Endurance champions Mark Webber, Brendon Hartley and Timo Bernhard in the leading Porsche closely followed by the sister #2 Porsche in third.

With the second Audi of Marcel Fassler, Andre Lotterer and Benoit Treluyer taking fourth on the afternoon timesheet, the leading Toyota of Anthony Davidson, Sebastien Buemi and Kazui Nakajima meant less than two seconds separated the top five spots.

In the 23-car entry LMP2 field the Eurasia Motorsport squad topped the test day with a 3m 36.690s to pull out half a second on WEC regulars Signatech Alpine.

WeatherTech Sportscar championship front-runners Corvette Racing with Jan Magussen, Garcia and Taylor topped the GTE Pro battle, with the Danish lead driver looking to make amends after his qualifying crash 12 months ago forced the entry out of last year's Le Mans.

In GTE Am Larbre Competition Chevrolet made it an American manufacturer clean sweep in the GT classes.

The Le Mans paddock will spend the next week preparing for scrutineering before the final practice and qualifying sessions ahead of the 84th running of the Le Mans 24 Hours on the 18-19th June.