Vauxhall Insignia hatchback (2008-2017) - MPG, running costs & CO2

Vauxhall Insignia diesel models are cheap to run, but not the best in class

Carbuyer Rating

3.5 out of 5

MPG, running costs & CO2 Rating

3.5 out of 5

There's such a huge choice of engines in the Vauxhall Insignia range, it's almost impossible not to find one that suits your requirements and lifestyle.

Vauxhall Insignia MPG & CO2

The most economical Vauxhall Insignia models are those with the ecoFLEX diesel engines. The 1.6-litre CDTi engine produces just 109g/km of CO2 with a manual gearbox and returns a claimed 68.9mpg.

These ecoFLEX engines’ ability to deliver such impressive economy figures in such a big family car is largely thanks to stop-start technology and other clever engineering tricks. These include measures such as a lowered chassis, special tyres and a front grille that automatically closes to improve the car’s aerodynamics.

If it’s ultimate performance you’re after, then the petrol-powered Vauxhall Insignia VXR Supersport is the one you want. It's very expensive to run, however: you're likely to see fuel economy of 26mpg at best, while road tax will set you back a hefty £500 every year if registered before April 2017.

There is, though, a far more sensible petrol engine available in the car. Ignoring the lacklustre 1.8-litre petrol, the range starts with a 1.4-litre engine, which has an economy figure almost as good as previous-generation diesels could achieve. The 136bhp 1.4-litre car manages 53.3mpg and emits 124g/km of CO2, making road tax £110 a year at current rates.

As far as the competition goes, a diesel VW Passat manages around 95-109g/km of CO2 emissions from one of its powerful TDI engines in either 1.6 or 2.0-litre form, which return 68.9 and 76.3mpg respectively.

Ford offers some very efficient diesels in its latest Mondeo, with the 1.5-litre version being the most efficient of them all. It's capable of returning 78.5mpg and has road-tax-busting CO2 emissions of 94g/km when paired with Ford's ECOnetic fuel-saving technology.


Insurance is pretty competitive, as the Insignia starts in group seven, rising to group 23 for some more expensive trim levels and more powerful engines. The Supersport model gets an expensive group 36  rating, though.


When compared to the coverage offered on its competitors, the Vauxhall Insignia’s warranty is fairly standard fare. Three years and 60,000 miles is pretty much what most other manufacturers offer, so it isn’t a unique selling point. What’s more, some rivals have superior warranties – the Hyundai i40, for instance, features a five-year/unlimited-mileage deal.


Servicing intervals for all versions of the Insignia are fairly spread out. Vauxhall states the car should have a check-up once every 20,000 miles or 12 months, whichever comes sooner.

Vauxhall servicing is also reasonably priced, so it should fit into your budget without too much difficulty. Servicing plans are also available, with the cost depending on your annual mileage, the length of the plan and which dealership you purchase the plan from.

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