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Diesel can give much better fuel economy (miles per gallon or kilometers per liter) than petrol but the downside is that diesel engines cost more to manufacture than petrol engines.
So a petrol-engined vehicle usually costs less money to buy than a similar make and model that has a diesel engine.
The design of a petrol-burning engine is different from that of a diesel engine: a petrol engine burns petrol (called gasoline in the US) which is ignited by a spark plug. A diesel engine burns diesel fuel which self-ignites when compressed.
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoThe main difference is the fuel that they burn, and more importantly, the way it is ignited. Apart from that diesels rev lower so they need another gear ratio and often aren't as fast off the start as petrol cars.
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The alternative name for the Diesel engine is the compression-ignition engine, since unlike the petrol engine which uses a spark to ignite the fuel / air mixture, it raises the air temperature in the cylinder by rapid compression sufficiently to ignite directly the injected spray of fuel oil. The compression ratio of a diesel engine is consequently significantly higher than that of a petrol engine; and the efficiency is often boosted by a turbo-compressor that on many large (e.g. lorry) engines is followed by an air cooler. These together increase the amount of air being compressed in the cylinder.
As for performance, I don't think there's that much difference now between them, not in cars anyway. A lower-revving engine would need a lower gear ratio (including that of the differential crown wheel & pinion) assuming same size wheels for the same speed; but to achieve that the engine needs to produce more torque at that speed. Most modern cars, petrol or diesel, have 1:1 4th gears and a 5th gear that is an overdrive (1: <1).
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What is the difference between Cars motor and Cars engine?
a motor normally uses electricity and an engine usees petrol or diesel... correct if wrong please
Which cars are long lasting diesel cars or petrol cars?
Cars that run diesel are long lasting than petrol cars.
Why do petrol cars steam more then diesel cars?
because petrol is easer to burn than diesel
Does petrol or diesel cost more?
diesel is usually more expensive but diesel cars usually have more mpg than petrol cars
What is the difference between normal cars and electrical cars?
Normal cars use petrol or diesel and have an internal combustion engine while an electric car uses an electric motor and uses electricity to power it.
Is petrol is used in diesel cars?
No, diesel engine require diesel fuel. Put petrol in a diesel engine and you will destroy it.
What is main fuel in cars?
Petrol or Diesel
What came first petrol or diesel?
Petrol came first, as it was more obvious as a use of power than diesel because it was flammable and already in liquid form, yet diesel was discovered as a use of power for engines later. I would say petrol because when they invented cars they made petrol cars and from the chemicals etc. in petrol they invented diesel
What is the difference between electric cars and petrol cars?
Electric cars are better for the environment. Whereas, the fuel vehicle emits harmful gases like carbon due to petrol or diesel. But, electric vehicles produce fewer greenhouse gases and air pollution than petrol. That's why interest in purchasing an electric vehicle is increasing.
Did olden day cars run on petrol?
No they ran on Diesel
Do Indians use petrol?
well i should expect so, they have cars,right? i mean they could use diesel but i expect most of their cars are petrol cars.
How many carbon dioxide emitted by cars per 1 meter?
There is a lot of difference between CO2 emissions from different cars. It will also depend on the type of fuel used : petrol (gasoline), diesel or other carbon based fuels.
