The most economical in the range is unsurprisingly a diesel, so if you’re looking for the lowest possible BMW 4 Series Gran Coupe running costs then the 418d is the car for you. Offering the potential to achieve the official figure of 62.8mpg while emitting just 119g/km means that day to day running costs should be minimal. That said, even the 420d Gran Coupe can return 60.1mpg while emitting only 124g/km.

Those looking to keep the rest of their costs down would do well to add the Service Inclusive Package, which covers the car’s general maintenance at a BMW dealer over a five year or 50,000 mile period, all for just £425. The good news is this package is transferrable between owners, helping to boost residuals at the time of sale.

For the best BMW 4 Series Gran Coupe emissions, you’ll need to look towards the 418d SE – riding on 17-inch alloy wheels – which can achieve just 119g/km of CO2. That’s all thanks to the firm’s Efficient Dynamics technology, which brings with it Brake Energy Regeneration, electric power steering, start/stop, aerodynamic optimisation and an eight-speed automatic gearbox.

It also uses an ECO Pro mode which optimises both the car’s systems and the driver’s responses, the latter through a series of real-time suggestions on driving style.

Everything about this car (save for some bodywork) has been tested and used extensively across the rest of the firm’s range so you can expect BMW 4 Series Gran Coupe reliability to be near perfect. Certainly the engines are generally renowned for being trouble free and gearboxes, whether manual or excellent eight-speed automatic, are the same.

There’s a lot of technology on board, including the complicated and sophisticated I-Drive, but while some of it may become an electrical nightmare as the car’s age approaches double figures it’s likely to behave perfectly for most owners.

Inside the cabin is as well-built as any other BMW, with much of it lifted directly from the 3 and 4 Series models, and unless you’ve specified the lightest shade of premium leather upholstery it’ll prove hardwearing too.