The larger the engine and the more cylinders it has the more fuel is "injected" into the cylinders ising more fuel
it depends on a number of factors such as the size of the fuel tank, the type of fuel, and the engine's fuel efficiency
An engine size, by itself, is not directly related to its fuel efficiency. The consumption will depend on engine design, the fuel itself, the mass of the vehicle - a litre will take a scooter a lot further than it will take a tank!
Generally speaking No. And of course it depends on what the other engine size that you are comparing it with. But generally speaking Supercharged engines arent made for fuel efficiency
Automobiles have an average fuel efficiency of around 23 miles per gallon. The specific efficiency will vary depending on the size and type of vehicle.
Vehicle weight, size of the engine, gear ratios, type of fuel, aerodynamic design. There are many many more but this is a good start.
The amount of fuel burn for a marine vessel is dependent on multiple factors. These include the vessel size, tonnage, propulsion type (fuel oil, diesel, nuclear, etc.), speed, marine conditions, and the engine efficiency itself.
That would depend on the fuel efficiency and size of the fuel tank of the vehicle.
The fuel efficiency of the car depends on the manufacturer, the model (including the engine size) as well as the driving style, road and traffic conditions.
As the Engine capacity/size increases it is unavoidable that the rest of the engine has to increase in size to cope with the larger forces the larger engine capacity produces. This has the unavoidable effect of increasing friction, and reducing Fuel Efficiency. Hence a 4 liter engine will use more fuel than a 2 liter engine if all other things such as: Technology, weight of vehicle, driving style, fuel type etc are the same. Having a vehicle capable of 180MPH, that does 15MPG is regarded as "a problem" by some when the speed limit is 55MPH and a vehicle capable of 100MPH will do 60MPG. **Cars with big engines are considered a problem because it uses more fuel and creates bigger emissions.
Horsepower is not dependant on engine size, but on engine efficiency and RPM, more information is needed to answer this question.
There is not enough information to give an answer. V6 tells you only that the engine has 6 cylinders which are laid out in a V shape. It says nothing about their size nor, more importantly, the fuel efficiency of the engine.
engine size is not always proportional to fuel consumption. need more data.