Diesel is often looked at as being smelly, noisy, and many think the only place for it is in a tractor. The truth to diesel vehicles is that they are slow, noisy, smelly, although they are cheaper to run than gas.
Diesel engines aren’t as powerful as gas engines, as gas engines produce more horsepower than that of a diesel engine. Diesel vehicles however, offer more torque than gas. Therefore, it is a very thin line as to which one is better.
When it comes to power, diesel is the more expensive of the two. Diesel powered vehicles are normally more expensive to buy than gas, and the parts are a lot more expensive than gas vehicles. The diesel however, is more reliable due to it being less complicated internally and heavier to build, therefore it normally lasts longer than gas engines.
Economy is always a factor as well, as will fuel prices being what they are. Now days, it costs a small fortune to fill up a gasoline vehicle, especially the bigger engines. When it comes to fuel, diesel is generally less expensive. You can fill up a diesel vehicle for less of a price, and the fuel will normally go longer than gas will.
Appearance is also important. Diesel is generally loud, with the exhaust emitting black smoke when the vehicle is throttled. You can normally tell when a diesel pulls off by the black smoke it leaves behind. Keep in mind, this isn’t a problem with the engine, just means that the fuel is dirtier.
Tuning is also important. Gas engines are more tun-able than diesel, as you can get better power increases from gas than you can with diesel. The major thing diesel owners tend to go for is turbo, as it is one sure way to match gasoline in terms of power.
A turbo charged diesel can and will match a standard gasoline engine for power, if not slightly better it a bit. This is why most diesel cars come turbo
charged, as its a way to keep up with the modern diesel engines of today.
When it comes to making the choice, you really have to choose what is best for you and your needs. If you want power with plenty of tuning options, then gasoline engines are what you want. On the other hand, if you want power and torque, then a diesel vehicle is what you want.
The choices are entirely up to you, as there are certainly plenty to choose from. Always check out the vehicle you are interested in, and find out if it will match your needs. Before you know it, you’ll have a diesel or gas vehicle that will perform well beyond your expectations.
Diesel Versus Gasoline
A diesel engine will go much farther on a gallon of fuel that the standard gasoline engine because of their designs, and due to the higher energy density of a gallon of diesel fuel. But, it also takes a bit more oil to manufacture a gallon of diesel than a gallon of gas, with the production and refining processes for diesel producing more gases that trap heat.
Therefore, when you consider the relative merits of diesel and gas cars, try knocking the MPG estimates for the diesel car down by 20 percent. A diesel vehicle will cost you a bit more, so you’ll get more bang for your buck from a gasoline vehicle.
The nasty rumors you hear about diesel are true as well – diesel is less refined than gas, or in other terms it’s dirtier. Diesel vehicles also emit more particulate matter and NOx, both of which are serious health hazards and air pollutants. Current diesel engines are more polluting per each mile they are driven than gas engines.
Using biodiesel on the other hand, will improve this situation. If biodiesel is available in your area, you’ll still need to examine whether a diesel is the right vehicle for you.
When you consider the facts, you have to ask yourself which models you can afford, what is the MPG, will engine be sufficient for you, and the number of passengers the vehicle will accommodate. Then, given your budget, you can go from there.
There are numerous gas and diesel vehicles available, all you have to do is decide which one is right for you. If you research carefully, you’ll have the perfect vehicle for your entire family.
Diesel Versus Spark Engine Ignition
As you may already be aware of, diesel engines are more efficient than gasoline engines of the same power, resulting in much lower fuel usage. For an efficient turbo diesel, the average is 40% more miles per gallon. The higher compression ratio with diesel engines help to raise efficiency, but diesel fuel also contains around 15% more energy per unit volume than gas.
Diesel engines that are naturally aspirated are far more massive than gasoline engines of the same power for two reasons. First, it takes a larger capacity diesel engine than a gas engine to produce the same amount of power. Essentially, this is because the diesel can’t operate as quickly. The rev limit is slower, because getting the correct fuel to air ratio into a diesel engine fast enough is more difficult than a gas engine. The second reason is due to the fact that a diesel engine needs to be stronger to withstand the higher combustion pressure needed for ignition.
Diesel engines also produce very little carbon monoxide as they burn the fuel in excess air except at full loading capacity, where a full quantity of fuel is injected per cycle. They can however, produce a black soot from the exhaust, which consists of un-burned carbon compounds.
Often times, this is caused by worn injectors, which don’t atomize the fuel sufficiently enough, or a faulty management system that allows more fuel to be injected that can then be burned with the available air.
For commercial use that requires towing, diesel engines tend to have more desirable torque. Diesel engines tend to have their torque peak quite low in their speed range which provides smoother control over heavy loads when starting from rest, crucially allowing the engine to be given higher loads at low speeds than a gas engine.
The lack of an electrical ignition system in diesel engines improves the reliability. The high durability of diesel engines is also due to the overbuilt nature as well as the combustion cycle, which will create a less violent change in pressure when compared to a gasoline type spark ignition engine.
Diesel fuel is also a better lubricant than gasoline, so it is less harmful to the oil film on piston rings and cylinder bores – making it routine for diesel engines to go 250,000 miles or more without having to be rebuilt.
For several reasons, diesel proves to be better than spark engine ignition. Diesel engines last a lot longer, they offer more torque, and they are also more reliable. They are also more expensive as well, although you get what you pay for. If you have never owned a diesel vehicle, you owe it to yourself to see everything they offer you – and you’ll find yourself a very satisfied customer.
Advantages Of Diesel Engines
If you’ve owned a diesel powered vehicle in the past or if you own one now, you no doubt appreciate the qualities this engine provides you with. More torque, better fuel economy, and easier maintenance are but a few of the attributes of owning diesel powered vehicles.
However, there are some motorists that still complain about the engine’s weak power, especially when accelerating from a full stop. What you may not be aware of is the fact that a diesel engine can be tweaked to give more power without harming the fuel economy.
Diesel engines use air compression to create combustion versus the fuel/air mixture that is required by gas engines. This attribute means that diesel engines don’t require spark plugs and therefore don’t need to be tuned up.
Diesel fuel has a much high fuel density than gas, which results in fuel economy increases of 20 – 30% over gasoline powered vehicles.
Diesel engines are also cheaper to maintain as they have less parts than that of a gasoline powered engine. The life span of a diesel engine is also much longer.
If you’re looking for torque, for pulling a boat or other equipment, then the diesel engine has the supreme advantage. Diesel engines are surely slower, especially when starting from a dead stop, although when you climb hills or go over bridges, the diesel engine is surely up to the task.
With trucks, diesel is normally the leader over gas engines in terms of performance and miles per gallon. Diesel trucks will get more miles than gas trucks, and the price for diesel is a bit cheaper than gas these days. And with gas prices on the rise, diesel will continue to dominate for a long time to come.
Why People Use Diesel
With diesel engines, the compression ratio is higher and there is more power. From a technical point, the compression ratio of an engine is the comparison of the total volume of the cylinder at the bottom of the piston’s stroke divided by the volume of the cylinder remaining at the top of the stroke.
Serious damage to gas engines can occur if you attempt to run a high compression ratio with a low octane type of fuel. Detonation is the ignition of the fuel due to the high temperature caused by a high compression ratio that is developed by design. The fuel is ignited prior to the spark of the plugs that result in a rapid, yet uncontrolled burning.
Keep in mind, the diesel is a heat engine, using heat developed from the compression of air. High compression ratios are possible since the air is compressed. The hot compressed air is sufficient to ignite the diesel fuel when it’s finally injected near the top of the compression stroke.
Fuel and air in the design of diesel engines are not premixed outside of the cylinder. Air is taken into the cylinder through the intake valve and then compressed to make heat. The diesel fuel is injected near the top of the piston’s stroke in an amount or ratio that corresponds to the load on the engine.
The higher compression ratio causes engineers to design, and test the block, heads, head bolts, crankshaft, connecting rods, rod bolts, pistons, piston pins, etc., with a greater range of structural capacity. To put it in other terms, diesels are heavier than gasoline engines.
Deciding on gas and diesel can be tough, although there are several reasons why you should use diesel.
- Diesel engines produce twice the power per gallon of fuel than gasoline.
- A gallon of diesel is normally cheaper than a gallon of gas.
- Diesel fuel doesn’t blow up. The fact is, its hard to get diesel to burn at all.
- Diesel engines will last four times longer than gasoline engines.
- Diesel fuel that is untreated will last longer in storage than untreated gasoline.
- Treated diesel fuel will last longer in storage than treated gasoline.
- Diesel fuel treatment will cost less than gas treatment.
- Spoiled diesel can be reconditioned to refinery specifications, as spoiled gas can’t.
- Unmodified diesel engines can be ran on vegetable oil.