Off road diesel is dyed but otherwise the same as highway diesel. The difference is in the tax. Highway diesel has a road tax on it
No. The only difference is a red dye added to off-road diesel to denote non-taxable use.
Their injection pump is set too rich, and lets more diesel into the engine than the engine can burn. The partially/badly burned diesel is what comes out as black smoke.
Diesel is a fuel with approximately 15-19 carbon atoms in a molecule.Whereas petrol has only 5-9.When air is mixed with diesel inside the combustion chamber it forms more molecules of carbon dioxide and monoxide.This results in producing more more pollutants.These pollutants come out in form of smoke.This is more in diesel than petrol engine.
Here's the rule: Gas goes faster, but diesel hauls heavier loads. There is much more energy in diesel fuel than in gasoline. Diesel engines can be hard to start in colder weather, and they leave plumes of black smoke in the air, sometimes.
In theory off road diesel is the same as that you would buy from the filling station although it may not be as pure or contain the engine preserving additives that the major fuel companies add to the diesel you buy at the filling station. In many countries the duty paid on Road fuel is Higher than that of off road diesel and as a result you could be breaking the law if driving a vehicle on public roads that is being fueled with off road Diesel.
Diesel engines are more efficient and do use less fuel, but they do not cost less than a petrol engine, they cost more. Diesel fuel also costs more. A diesel engine will however last longer.
Diesel takes longer to burn than gas so, accordingly diesel is more fuel efficient.
diesel is usually more expensive but diesel cars usually have more mpg than petrol cars
Diesel engines have more power in the form of torque. Torque is basically the force exerted on the road by the tires which means you can haul more weight with a diesel engine. But it won't be "fast" in most cases. If speed is what floats your boat I'd say go with a gasoline engine.
Of an individual diesel engine and an individual steam engine of the same energy output the diesel engine would be less polluting. It is far more efficient. However, there are far more diesel engines than steam engines in the world today so overall diesel engines pollute more than steam engines.
Gasoline has more energy per lb than Diesel.