Porsche returns to Le Mans prototype racing this year, and it’s invading the French 24-hour trial with the 919 hybrid you see here. Outwardly, the 919 hybrid doesn’t look all that different from, say, Audi’s dominant R18 e-tron Quattro, what with its low, wedge-shaped body and central vertical stabilizer. And the only Porsche-esque styling cues [...]