New competition led Vauxhall to refresh the Insignia in 2013. We’ve been running Sports Tourers for a few months, first a petrol car and now this 2.0-litre diesel.

The Ecoflex engine promises remarkable economy, with an official combined figure of 72.4mpg. As well as low running costs, the Vauxhall is inexpensive to buy: just over £23,000 is competitive for a big family estate car. But, of course, we’re keen to discover what tow car potential this diesel estate has.

We want to see if Vauxhall’s improvements to the Insignia Sports Tourer are enough to keep it competitive against the likes of the new Ford Mondeo and VW Passat. Does it tow well and how fuel-efficient is it with a caravan behind it?