The 2015 World Endurance Championship ran 8 races in 8 countries, with 274 race entries in total. This is the peak of the LMP1 hybrid era, with Audi, Porsche and Toyota spending at a level the class never saw again.
Porsche took 6 of 8 overall wins, a share of 75%. The rest went to Audi (2).
The longest race of the year was the 24 Hours of Le Mans over 24 hours; the largest field lined up for the 24 Hours of Le Mans with 55 cars. Classes contested: LMP1, LMP2, LMGTE Pro, LMGTE Am.
Each race below links to its own data analysis: pace order, reliability by class, lead changes and closing stability, all measured the same way.