Question: what is the difference between formula one cars and indy cars?
Answer: The difference between F1 and Indy in terms of the engine is that F1 uses a 1.6-liter V-6 whereas the Indy car comes with a 2.2-liter V-6. ... Though carbon brakes are allowed on an Indy when the case is 2.5-mile super-speedways; in all other races, it is mandatory for Indy cars to use steel brakes.