Parkers overall rating: 3.9 out of 5 3.9

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 7.7 - 9.2 mpp
Diesel engines 10.4 - 11.7 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 45.6 - 54.4 mpg
Diesel engines 62.8 - 70.6 mpg
  • Diesel is economy champion
  • Lightweight body means impressive mpg
  • 100hp petrol returns good figures, too

The Corsa offers three combustion powertrains in the UK – the electric Corsa-e is covered in a separate review here – two petrols and a diesel. All three offer impressive running costs with their own caveats.

The 100hp petrol is expected to be the best-selling engine in the UK, and buyers will be pleased to know it’s impressively efficient. All models thus equipped emit less than 100g/km of CO2, while fuel economy is a possible 51.4mpg depending on gearbox, wheel size and equipment. Even the very thirstiest variant of this engine returns a claimed 47.1mpg – and as these are figures obtained under WLTP testing, they should be more accurate than old, NEDC figures.

On testing this model in high-spec Elite Nav trim, we achieved over 40mpg with ease – on a challenging, mountainous test route while making the most of the car’s performance. We see no reason why 50mpg shouldn’t be easily achievable.

Vauxhall Corsa (2020) engine

Also available is a 75hp variant of the 1.2-litre petrol, which is cheaper to buy. It claims the same maximum economy of 51.4mpg as the more powerful model, though, and since it’s likely to need working harder to achieve the same performance fuel economy will drop correspondingly.

The 1.5-litre diesel is likely to be a niche seller in the UK, as it costs much more to purchase than the petrol models. Usually, we shy away from recommending small diesel cars, as the improved fuel economy won’t offset the purchase price for anybody but the highest-mileage drivers.

However, the Corsa diesel returns such exceptional economy that it could pay for itself in just a few years. Claimed economy is a maximum 68.9mpg, and even in spirited driving we were unable to push that number below 60mpg. Vauxhall’s UK MD even claimed to have achieved in excess of 80mpg – a hugely impressive figure. In fact, with number like those, the diesel begins to make sense for even the average driver. The diesel would pay for its increased purchase price in less than three years in fuel costs alone, for a driver doing 12,000 miles a year.

Is it reliable?

  • Completely unrelated to previous Corsa, so no historical data
  • New underpinnings from French PSA Group
  • Engines have proven largely trouble-free

Previous Corsas have been middle-of-the-road for reliability, being based on well-proven (or, to be more mean, old) components and a platform that dated back to 2006. However, the new model isn’t just unproven, it’s also a whole new manufacturing group – now based on PSA Peugeot Citroen components, rather than General Motors, the brand’s previous owner.

In short, we simply don’t know how reliable this new Corsa will be. The engines have been around in PSA products for a few years now, though, and have returned few problems, which is a good sign. And Vauxhall’s huge dealer network should ensure you’ll never be too far from somebody who’s capable of maintaining and repairing the car.

Vauxhall offers a three-year warranty, which isn't as generous as the five years offered by the Hyundai i20 or seven years for the Kia Rio.

Vauxhall Corsa (2020) badge

Ongoing running costs

Road tax (12 months) £155
Insurance group 10 - 23
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