BMW has taken its large luxury SUV into a new era with the fifth-generation X5, offering buyers everything from traditional diesel power to plug-in hybrid and fully electric propulsion. But it’s the battery-powered iX5 that makes the strongest impression, combining the handling prowess that has defined the X5 since 1999 with an enormous battery and technology borrowed from the smaller iX3.

The electric flagship was available at launch in xDrive60 guise, powered by two motors producing 425kW. That’s enough to propel the hefty 2.8-tonne SUV from 0-100km/h in just 4.6 seconds, with a top speed of approximately 209km/h.

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Despite those figures, the iX5 isn’t an intimidating performance machine. Its accelerator response is progressive and easy to control, avoiding the abrupt delivery that can make some powerful EVs difficult to drive smoothly. There’s even a synthesised soundtrack to accompany the application of grunt, adding a touch of drama without becoming intrusive.

More impressive is the way the BMW tackles corners. During an initial drive on the winding roads of southern California, the iX5 displayed remarkably precise steering and excellent body control, doing a great job of disguising its hefty size through tight bends and changes in elevation. Ride comfort is another highlight, although the suspension’s sporting character means it isn’t quite as relaxed as a Volvo EX90 on smoother roads.

The cabin is generally quiet, but some tyre noise and wind whistle around the mirrors become noticeable at higher speeds. BMW’s advanced driver assistance technology also impressed, offering hands-free motorway driving at speeds of up to around 130km/h, although the system occasionally wanders slightly between lane markings.

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The iX5’s biggest technical achievement could be its 141kWh battery, which provides a claimed driving range of up to 850km. An 800-volt electrical architecture supports DC charging at up to 460kW, allowing the battery to reach 80 per cent in as little as 23 minutes. Charging at home is considerably slower, with a complete recharge taking more than 20 hours using a typical 7kW wallbox.

Inside, the iX5 introduces BMW’s Panoramic Vision iDrive system, which projects key driving information across the base of the windscreen. A large central touchscreen handles most functions, while an optional passenger display adds entertainment capability, although its usefulness is questionable given the already extensive technology.

Material quality is excellent, with soft-touch surfaces and solid construction throughout. Optional powered doors provide another luxury flourish, although they can be awkward to operate.

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Measuring 4994mm long, the iX5 offers generous accommodation for five occupants, but there’s no seven-seat option. Boot capacity stands at 650 litres, expanding to 1850 litres with the rear seats folded. A further 53 litres of storage is available beneath the bonnet, and the iX5 boasts a 2700kg towing capacity.

However, good as the iX5 is, some prospective buyers should consider whether they really need the extra size and expense over the smaller iX3, which also offers similar tech and the sort of driving experience BMW has become famous for.

The iX5 is an exceptionally capable luxury SUV, but BMW’s increasingly impressive electric range means its biggest competition could come from within its own showroom.