The biggest part is aerodynamics, in my non-engineering
experience. The better the aerodynamics, the better the fuel efficiency. There are more factors to this like weight, gearing, etc.
It can affect the cost, fuel guzzler tax.
Because the fuel is like gas and it can affect anybody...
Other than maybe breaking old rusty fuel lines. It shouldn't affect anything accept make the car run or run better
Aerodynamic design improves fuel mileage, handling, and how quiet the car is when traveling.
They usually try to make the car they are designing, more fuel efficient, safer, and try to come up with ways to improve the current design.
It depends entirely on the design of the car ! Smaller cars have smaller fuel tanks.
Drag is a force that opposes the motion of a car, generated by air resistance. It acts in the opposite direction to the car's movement, slowing it down and requiring more energy to overcome at higher speeds. A streamlined design can help reduce drag and improve the car's performance and fuel efficiency.
Using a fuel other than specified could adversely affect the emission control system, and may affect warranty coverage.
It doesn't really, the size of a car is governed by which class of racing it is taking part in.
It can effect engine performance and fuel burning efficiency.
Assuming you mean fuel PUMP relay, it is the remote switch that turns the fuel pump on and off. If it fails, your engine will not run.
Yes, the design of a car can affect its speed. Factors such as aerodynamics, weight distribution, and overall shape can impact the car's ability to move efficiently through the air, which can ultimately affect its speed and performance. sleek, streamlined designs are typically better suited for achieving higher speeds.