What is the difference between a diesel and a petrol engine?

I am planning to buy an Audi 80 and am considering between the diesel and petrol engine options. Can you explain the technical differences between the two and which one would be better for me?

The main difference between a diesel and petrol engine lies in their combustion processes. Diesel engines use compression ignition, while petrol engines use spark ignition. In simpler terms, diesel engines compress air, which creates heat and ignites the fuel, while petrol engines use a spark to ignite the fuel-air mixture. In terms of which one is better for you, it depends on your driving needs and habits. Generally, diesel engines offer better fuel efficiency and torque, while petrol engines have a higher top speed and are better for short distance driving.

Another major difference between diesel and petrol engines is their fuel efficiency and emissions. Diesel engines tend to have better fuel efficiency and produce less carbon dioxide emissions, while petrol engines produce more carbon monoxide and nitrogen oxide emissions. However, diesel engines also emit more harmful particulate matter, so it is important to consider the environmental impact when choosing between the two.