- Improvements on most popular engines
- Diesel is still the most economical
- Avoid the 2.0-litre petrol if you're after economy
The Vauxhall Insignia Grand Sport has a keen eye on costs, with 3-10% improvements in fuel consumption for the biggest sellers – the 1.5-litre Turbo petrol and 1.6 Turbo D diesel.
You can aim for 47mpg for the former regardless of whether you pick the 140hp or 165hp output, while the most powerful 2.0-litre, 260hp petrol comes in with a behind-the-times 32.8mpg. Bear in mind this engine is available only with four-wheel drive and an automatic gearbox.
No surprises that the 1.6-litre diesel is the most efficient, with 70.6mpg boasted by the 110hp version (65.7mpg if you pick the 136hp) and even the larger 2.0-litre diesel tops all the petrol figures with 54.3mpg.
Estimated fuel cost per year
|Fuel type||Pence per litre||Estimated cost per year *|
|Unleaded||116p||£1,122 - £1,648 *|
|Diesel||118p||£766 - £1,052 *|
* The estimated fuel cost figure is based on an annual mileage of 10,000 miles and is a guide to how much this model will cost in fuel each year. It's calculated using the model's average MPG (calculated from both town centre and motorway driving) and the average fuel price from around the country. Actual fuel costs will vary based on driving style and road conditions.
Ongoing running costs
|Servicing period||Service intervals determined by driving history|
|Warranty||Three years (unlimited mileage for the first 12 months and subject to a total mileage limit of 60,000 miles from first registration)|
|Road tax (12 months)||£140|
13 - 25
How much is it to insure?
Vehicle excise duty (VED) varies according to the CO2 emissions and the fuel type of the vehicle. For cars registered before 01 March 2001 it is based on engine size. For cars registered on or after 01 March 2001 the VED or road tax is based on the car's CO2 emissions.
The cheapest engine to run also boasts the lowest CO2 emissions – pick the 1.6-litre, 110hp unit and you can expect 105g/km.
Petrol buyers will have to settle for 133g/km of CO2 from the 1.5-litre, 140hp engine, rising to 197g/km from the larger 2.0-litre model.
Highest and lowest CO2 emissions
|Engine||CO2 emissions||Road tax (12 months)|
|1.6 CDTi (110ps) Diesel||105 g/km (Min)||£140|
|2.0 (260ps) Petrol||197 g/km (Max)||£140|
- Overall Vauxhall Insignia Grand Tourer reliability should be strong
- Previous car had two recalls but neither had any mechanical bearing
- Strong interior construction with plenty of hard-wearing materials
It’s hard to say with any authority how this new car will perform in terms of reliability but if the old model is anything to go, there's not much to worry about.
The 1.5-litre petrol engine is the only new unit; the rest of the line-up are tried and tested in the Insignia and elsewhere.
The interior feels well-constructed and hard-wearing so we’d have little concern about bits falling off or becoming damaged over time.
Car checklist problem points
|Body||No problems reported.|
|Engine / gearbox||No problems reported.|
|Other||No problems reported.|