Skip advert
Advertisement

Diesel isn’t always a dirty word

Jordan Katsianis explains why he thinks we don’t all have to buy petrol cars or EVs. There is another way that makes real sense for some buyers

Opinion - diesel

I’ll admit I’m a pretty fundamentalist petrolhead, so it took a while for me to accept that EVs were the right answer to many requests for new car-buying advice. However, in the past year or so I’ve found myself oddly campaigning for a very unexpected alternative: diesel. 

There’s no doubt that this technology has taken a colossal beating thanks to the bad press brought on by Volkswagen and its co-conspirators during the Dieselgate scandal. And it’s understandable that we, the British public, have probably had enough of being told it’s a solution to climate change only to be, in effect, lied to. But I’m here to tell you that diesel isn’t a dirty word for our short-term goals in reducing carbon emissions. 

Advertisement - Article continues below

However, I will caveat this by saying that, whether you live in a city, the suburbs or even the countryside, electric cars are by and large, the better option. Yet, for those of you who just do too many miles for an EV to make sense, or if you’re as yet unwilling to adjust to the behavioural changes that inevitably go hand in hand with making the switch to electric power, a diesel car can – for now at least – be a better option than a pure petrol model. Let me explain. 

Diesel cars became popular for one main reason. They generally use less fuel and emit less CO2 than an equivalent petrol car, and this is largely still the case. A good example are family SUVs: an Audi Q7 fitted with a V6 diesel engine is rated on the official WLTP cycle at between 34-35.8mpg, with CO2 emissions of around 208-217g/km. The petrol V6 sees this drop to 26.4-27.4mpg, while CO2 output rises to 235-243g/km. 

There is a plug-in hybrid variant that is significantly more efficient on paper, but its consumption figures skyrocket when the battery is depleted, because the petrol engine has to deal with the added mass of the hybrid system. So when it comes to long-distance cruising, a modern, properly maintained diesel-engined car is still often the best choice until other, more efficient options present themselves. 

If you mainly drive in towns and cities, or have a reasonable commute with at-home charging, buy an EV – it won’t just be good for your conscience, it’ll also save you money. But if you’re sitting on motorways at a constant cruise for more than 100 miles a day, a diesel is still best. Here’s hoping the Government will take this into account and make sure that any upcoming legislation is as nuanced as the answer is. 

Buy a car with Auto Express. Our nationwide dealer network has some fantastic cars on offer right now with new, used and leasing deals to choose from...

Skip advert
Advertisement
News editor

News editor at Auto Express, Jordan joined the team after six years at evo magazine where he specialised in news and reviews of cars at the high performance end of the car market. 

Skip advert
Advertisement

Recommended

What is hypermiling and how do you do it?
Whisky fuel feature - Martin filling up

What is hypermiling and how do you do it?

Hypermiling helps you get the most from every last drop of fuel to maximise MPG. We explain how it works, and how it can save you money…
Tips & advice
25 Jun 2026
New BMW iM3 to be the most powerful M3 ever, but keep the classic M-car feel
BMW M Concept Neue Klasse - front

New BMW iM3 to be the most powerful M3 ever, but keep the classic M-car feel

The first-ever electric M3 is due to arrive next year, featuring a quad-motor powertrain capable of delivering upwards of 1,300bhp, but BMW is likely …
News
22 Jun 2026
UK 2030 petrol and diesel sales ban: what is it and what cars are affected?
fuel pump

UK 2030 petrol and diesel sales ban: what is it and what cars are affected?

The ban on the sale of new petrol and diesel cars is set to be introduced in 2030, we explain what it means for you and your motor
Tips & advice
18 Jun 2026
Citroen's MPV comeback plan is fantastic news for families
Opinion - Citroen MPVs

Citroen's MPV comeback plan is fantastic news for families

Paul Barker explains why Citroen’s potential return to the MPV market is something to get excited about
Opinion
15 Jun 2026

Most Popular

Can you park over a dropped kerb? Blocked driveways, rights and the law explained
Dropped kerb - header image

Can you park over a dropped kerb? Blocked driveways, rights and the law explained

A dropped kerb allows vehicles to legally cross the pavement between the road and a private driveway or parking space, here’s everything you need to k…
Tips & advice
22 Jun 2026
New Volvo XC70 2026 review: classy PHEV dazzles with its range
Volvo XC70 - front

New Volvo XC70 2026 review: classy PHEV dazzles with its range

The new Volvo XC70 is China-only at the moment, but there are plans to bring it to Europe
Road tests
22 Jun 2026
New Renault Megane facelift: 310-mile range, sportier looks and MagSafe
Tom Jervis with the facelifted Renault Megane

New Renault Megane facelift: 310-mile range, sportier looks and MagSafe

Mid-life update for Renault’s electric family hatch brings a bigger LFP battery and refreshed styling
News
22 Jun 2026

Find a car with the experts