Porsche has explained that an increased commitment to GT racing, which encompasses the four-car GTE Pro class assault at Le Mans, was part of its strategy in leaving the P1 ranks of the FIA World Endurance Championship in favour of a Formula E entry in 2019/20.

Frank-Steffen Walliser, Porsche Motorsport's GT boss, told Motorsport.com: "When we made a decision to change our top sporting category, part of the idea was to allow us to strengthen our commitment to GT racing.

"That includes Le Mans, but also our customer programmes in GTE and GT3.

"We would not have been able to do that if we were still competing in a more expensive category like LMP1."

Porsche is bringing the CORE autosport team over from the IMSA WeatherTech SportsCar Championship to field a pair of 911 RSRs at Le Mans alongside the WEC squad.

The marque will also enter a factory team in the Blancpain GT Series Endurance Cup and has made a full-season commitment of the Intercontinental GT Challenge.

Walliser revealed that a number of different options had been under discussion for its expanded Le Mans campaign.

"We discussed three or four cars, he said. "If it is three, do we add an extra car to the existing team or bring one car from the USA?

"That would have been a compromise either way, so it made sense to bring the full US team and do four cars."

Porsche has reshuffled the driver line-ups across its GT programmes in the wake of its withdrawal from LMP1.

Nick Tandy and Earl Bamber return to the IMSA ranks in the GTLM class, while newcomer Gianmaria Bruni moves to the WEC after half a season in North America in 2017.

Walliser said it was always the intention to place Bruni in the WEC after his recruitment from Ferrari and described his half-season in IMSA this year as an "bridging programme" after a period of gardening leave.