Some cars leave a paper trail; the Dallara SF19 left a name and a place in Dallara's list. What follows is what can be said with a source behind it.
The story
The Dallara SF19 is an open-wheel single-seater chassis produced by Dallara for use in the Japanese Super Formula championship. It debuted in 2019, replacing the Dallara SF14 chassis. Throughout its production, it was the sole chassis used in Super Formula, however an engine development war between Honda and Toyota can lead to significant performance differences between the Honda and Toyota powered models.
What is underneath
550 bhp is the published figure. It weighs 670 kg. Work it out per tonne and you get about 821 horsepower — hypercar territory, where the limiting factor is the tyre, not the engine. The wheelbase is 3115 mm. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Its place in the line
Its family tree is legible: it took over from the Dallara SF14; its successor was the Dallara SF23. Nearby in the Dallara catalogue sit the Dallara 320 and the Dallara F191.