Some cars leave a paper trail; the Dallara P217 left a name and a place in Dallara's list. What follows is what can be said with a source behind it. Jos Claes drew it.
The story
The Dallara P217 is a sportscar prototype built by Dallara Automobili to the 2017 FIA/ACO regulations for the Le Mans Prototype LMP2 class. The car also meets the regulations for the Le Mans Prototype 2 Class of the IMSA WeatherTech Sportscar Championship. It was active in the FIA World Endurance Championship, the European Le Mans Series and Asian Le Mans Series. The prototype made its debut at the 2017 4 Hours of Silverstone.
What is underneath
603 hp is the published figure. It weighs 930kg. Work it out per tonne and you get about 648 horsepower — hypercar territory, where the limiting factor is the tyre, not the engine. The wheelbase is 3010mm. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Its place in the line
Nearby in the Dallara catalogue sit the Dallara 320 and the Dallara F191.