The cars run 2.2-litre twin-turbocharged V6 engines from Honda and Chevrolet and produce between 550bhp-700bhp depending on the amount of boost used and the type of circuit being raced on (generally speaking there’s a lower power figure on ovals for reasons of durability and safety).
Once again, I’m talking about their speed in this race. Not what type of engines they have. It is what it is.