The difference between diesel and gasoline engines is: 1, due to the different ignition methods, diesel engines are relying on compression ignition to do the work, the so-called compression ignition, is to rely on the piston pressure in the cylinder, resulting in diesel fuel pressurized spontaneous combustion, which requires a very large compression ratio, to put it bluntly is the depth of the piston downward pressure is very deep; 2, which makes diesel engine output torque will be bigger than the gasoline engine. The large torque will not affect the speed of the car, but will affect the car's instant acceleration, and load capacity, so many tool trucks use diesel, to put it bluntly, there is strength. In addition, all diesel engines are turbocharged. This is also a feature; 3, clean: diesel fuel in foreign countries is a clean fuel, because the emissions are cleaner, low fuel consumption, also makes a lot of large-displacement cars abroad to choose diesel. But in the country is the opposite, diesel is not clean fuel, this is why. Because the domestic diesel fuel contains more wax. Wax is easy to precipitate condensation, clogging oil pipes and exhaust systems, emissions are also more polluting. So many domestic cities have banned the use of diesel fuel systems for passenger cars.