Cars advice guides

Expert advice from Which? on the most reliable new and used cars, how to buy and sell, finance options, fuel economy, tyres, tax and how to find a good garage, plus unique interactive tools.

30 articles

How to buy the best car

We explain how to buy a cheap new car and find the right model for you

Best Buy cars

The best new and used cars you can buy, as tested by the experts at Which? Car. Find out which models we recommend, from tiny city cars to large SUVs and everything in between.

Petrol vs diesel vs hybrid cars: which is better?

Should I buy a diesel, petrol or hybrid car in 2024? Our expert guide reveals which cars are the most economical and what you need to know about emissions

18 December 2023

Electric car charging guide

We reveal how much it really costs to charge an electric car and how it compares with hybrid, petrol and diesel cars

Car tax explained

How much car tax you'll need to pay on petrol, diesel, hybrid and electric cars from April 2024, and which cars are exempt (for now)

17 April 2024

Which? Car Survey

Take part in the Which? Car Survey 2024, and be entered into our £2,500 prize draw

Driver calculators and tools

How efficient is your car? Use our fuel calculator to check your mpg

Where to buy a car

Is a dealership the best place to buy a new or used car? From car supermarkets to classifieds, we explain and rate all your car buying options.

28 March 2024

Money-saving fuel and driving tips

Spending too much money fuelling your car? Our guide shows you how to make your money go further and cut the cost of driving

28 March 2024

Supermarket petrol quality: what you need to know

Filling up at your local supermarket petrol station can often be cheaper than choosing an oil company’s forecourt. But should you be worried about exactly what’s going in your tank?

5 March 2024

How we test

Every car we review is subjected to hundreds of tests in our lab and on the road. Find out how our tests help you choose the best car, and avoid the worst.

Speeding fines and tickets explained

Learn your rights about speeding fines, whether it’s worth contesting a speeding fine and how technology can help you avoid them

1 March 2024

Best car scratch removers

Discover the best car scratch remover for buffing away minor scratches, that's easy to apply and keeps your car looking pristine

27 February 2024

Best car breakdown cover

Find out the best car breakdown providers and how to buy the best breakdown cover.

Want to buy a low-emission car? Our tests show that NOx exhaust emissions are plummeting but CO2 from many new cars is actually on the rise. Our free low-emissions checker will help you find the cleanest cars on the UK market.

Parking tickets and fines explained

Finding a parking ticket stuck to your car windscreen isn't nice. Our guide explains your rights, how to contest a parking ticket and avoid getting more.

5 February 2024

How to sell a car

Our top tips on getting the best price for your car. Plus we explain part exchange, classified ads, auctions and online car-buying services.

5 February 2024

How to pass an MOT check

Is your car due its MOT check? Give your car a better chance of passing the test first time, with our easy tips to getting your car in shape.

22 January 2024

How to find a good garage

Finding a good, trustworthy garage that’ll charge you a fair price is crucial to keeping your car roadworthy and your bills in check. These tips will help you choose wisely.

22 January 2024

Car reliability

Most reliable car brands - which car brands can you trust, and which may let you downMost reliable car models - our tool will help you pick a car that won't let you downCar reliability data - don't buy a new or used car without using the results of our re

Cars advice guides

How to buy the best car

Best Buy cars

Petrol vs diesel vs hybrid cars: which is better?

Electric car charging guide

Car tax explained

Which? Car Survey

Driver calculators and tools

Where to buy a car

Money-saving fuel and driving tips

Supermarket petrol quality: what you need to know

How we test

Speeding fines and tickets explained

Best car scratch removers

Best car breakdown cover

Car emissions

Parking tickets and fines explained

How to sell a car

How to pass an MOT check

How to find a good garage

Car reliability

Winter tyres and snow socks

How to get the best price on a car

How to care for and jump start your car battery

How to buy car tyres

How to change a car tyre or use a repair kit

What to do if you have a car accident

Which? Don't Buy cars

Should you buy a used car warranty?

Car finance options explained: how to get the best deal

Car safety features explained