Petrol vs Diesel cars: Which one to choose?

A confusion for many people while buying a new car is choosing between petrol and diesel. Diesel was originally meant for commercial trucks and lorries. The solution to this dilemma solely depends on your driving habits.

Picking between petrol and diesel power affects many parameters including how to much you pay to refill yours at the pump. It will impact your economy, your performance and other real-world running costs like tax.

Why diesel cars are more expensive to buy?

Diesel engines usually require extra hardware that petrol ones don’t. To reduce emissions and comply with norms, devices like diesel particulate filters(DPF) systems often have o be fitted and these cost money!



  • Cheaper to buy as compared to diesel.
  • Lower service cost.
  • Less noisy.
  • Petrol cars produce less of some dangerous gases like nitrogen oxides.


  • Petrol engines are less efficient which means you use more fuel. Plus, petrol is pricier than diesel that converts into more running cost.
  • Petrol engine emits more CO2 than diesel cars.
  • Petrol engine needs the driver to change the gear more regularly as most of the power remains in the top end of the rev band. (but some people will actually prefer this driving style.)



  • Diesel engines are more efficient. they use 15-20% less fuel meaning cheaper running cost.
  • Lower CO2 emission as compared to petrol engines.
  • Diesel cars offer more torque at lower rpm which means they have better overtaking power and towing capability.


  • Diesel cars cost more than petrol. Plus, service costs are also higher as compared to petrol(not much difference though).
  • Despite lower CO2 emissions, diesel fuel produces tiny particles linked to breathing disorders such as asthma.
  • Diesel engines tend to be noisier(This is improving though).


If most of your journeys are local and your mileage is lower, a small petrol car might be more suitable for you. And if you do lots of kilometres on regularly a diesel car would make a lot of sense.

Also, keep in mind that newer have a special filter fitter to help prevent pollution. It’s called a diesel particulate filter (DPF). These can clog if the vehicle isn’t used regularly on a motorway, and is costly to fix or replace. This means if you don’t use motorway ofter, a diesel might not be for you.

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