The cars are same only by means of regulations. But at times, some aspects of the cars are tailored for some drivers. e.g. The Lotus’ from 2012, 2013 season. The front end was tailored for both Romain and Kimi.
Can F1 teams have two different cars?
Formula 1 restricts the teams to two cars to keep something like Jack Roush’s Five Car Team from happening. (In NASCAR, a “team” is one car and what F1 calls a team NASCAR calls a car owner.) In the old days each team got to test seven times on speedways that were part of the circuit for their series.
Why doesn’t F1 have the same cars?
Because it’s a racing formula, in other words a series of technical specifications to which teams have to adhere to to build their own car. In a racing series drivers drive the same car. F1 is about driving and technical/engineering skills whereas a series is only focused around driving and setup skills.
Can there be more than 20 drivers in F1?
This year the practice sessions are smaller so I am not sure if the teams would want to take time away from their regular drivers. But, as per F1 rules, it is allowed to switch drivers during practice sessions. There is no limitation of 20 cars.
Can an F1 team have 3 drivers?
Yes to one car teams, no to two three car teams.