?? Perhaps you're thinking of Formula 2, where teams use the same engine, chassis, and tires. Winning is more about driver skill, and about execution on the part of the team. Formula 1 is widely regarded as a team sport where designing the best car is required for victory.

There are a number of former world champion drivers who are currently driving for lower tier F1 teams (Fernando Alonzo, Sebastian Vettel), and they certainly have what it takes to be champion drivers, but they have inferior cars.