From £19,1356
Price, fuel economy, range and depreciation

There’s no difference in price between diesel and petrol versions of the Insignia GSi. Both variants of the Grand Sport cost from £32,975, which rises to £35,465 for the Sports Tourer estate.

Our test car, which was fitted with £715 worth of options, came in at £36,180. Standard kit includes satellite navigation, DAB radio, Android Auto and Apple CarPlay connectivity, leather sports seats, a head-up display and plenty of safety tech so, at a glance, it would seem you’re getting plenty of equipment for the money.

Insignia GSi is on a par with the cheaper Mondeo, but comes up trumps against the pricier Superb

However, an all-wheel-drive Mondeo ST-Line Edition estate with a 178bhp 2.0-litre diesel engine – which will set you back from £30,710 – comes with comparable levels of equipment.

Granted, you don’t get adaptive dampers or Brembo brakes, and there is a bit of a power deficit, but asking roughly a £5000 premium for a large estate that’s otherwise comparably equipped does seem excessive.

The Vauxhall doesn’t perform any better than the Ford in terms of depreciation, either. Over the course of 36,000 miles and 36 months of ownership, according to our experts’ predictions, both cars will retain 42% of their value.

As for CO2 emissions, Vauxhall says this Insignia model emits 187g/km, and its extra urban claimed fuel economy is a quoted 48.7mpg; and although we approached the latter on a sustained 70mph motorway run, neither figure will endear the GSi to many, given that the four-wheel-drive diesel executive wagons that the Insignia is seeking to undercut are pretty much all sub-140g/km prospects.

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