Both Vauxhall dealers and supermarkets should offer reasonable deals on a new Insignia Sports Tourer which might go some way to off-setting the traditionally heavy depreciation suffered on mainstream cars of this size. The smaller petrol versions as well as the diesel offer decent running costs and insurance groups are also low. Servicing at Vauxhall dealers is relatively inexpensive too.

For cars launched after the 2013 refresh the most economical version is the 2.0-litre diesel in either 118bhp and 138bhp guise. This emits 104g/km and returns 72.4mpg, meaning low company car tax or road tax and a long cruising range.

Most Insignia Sports Tourer models will be the diesels, which have CO2 emissions of 159g/km for manual versions. Both 1.8-litre and 1.6 Turbo offer 187g/km and 186g/km respectively, which are good given their power outputs of 140bhp and 180bhp.

After the 2013 refresh the cleanest model was the 118bhp or 138bhp diesel engines, which both emit just 104g/km.

Vauxhall models tend to offer decent levels of reliability, although not quite at the level of the best Japanese brands. Quality has been given a high priority with the Insignia, so there is a chance it will be improved over the Vectra.