Cars with good aerodynamics.
Their shape and aerodynamic efficiency makes them streamlined.
aircrafts and fast cars are streamlined so that the air flows over them more easily
They have a streamlined bonnet so that the air will be pushed over the car.
Helps improve fuel mileage.
the way they were desinged by the builders
Jack Brabham drove a 2-litre streamlined Cooper in the 1955 British GP (Bristol engine) with the engine in the rear. The Bugatti in 1956 French GP was rear engined. Lotus first entered rear engined cars in 1960, BRM also. Ferrari went to rear engined F1 cars in 1961.
F1 is great but it depends whether your interested in cars and racing or not!
No but the F1 cars have a flappy paddle gearbox.