The Volvo XC90 has been refreshed for the 2020 model year.

The big news, however, is the arrival of a series of mild-hybrid engine options wearing a new ‘B’ badge.

For example, the XC90 will be offered with the choice of a new B5 mild-hybrid diesel powertrain or a new B6 petrol mild-hybrid.

The mild-hybrid system uses a conventional combustion engine – a 2.0-litre twin-turbo diesel in the case of the B5 with 235hp – plus a 10kW electric motor capable of delivering an additional 40Nm of torque when required.

The electric motor is powered by energy recuperated by a new brake-by-wire set-up that recovers kinetic energy during braking, storing it in a 48-volt battery.

Volvo claims the new ‘B’ models can achieve fuel savings of up to 15%, with the B5 recording WLTP-certified figures of 37.7-44.1 mpg on the combined cycle.

Emissions see a similar reduction: the B5 achieves CO2 emissions of 154-156 g/km depending on tyre size, compared to 184-189 g/km for the petrol-only T5.

It’s no slouch, either, completing the 0-62mph sprint in just 7.6 seconds.

Joining the new mild-hybrid system is an updated automatic transmission, said to help the XC90 achieve increased efficiency yet with sharper acceleration from a standstill.

In the UK, the new B5 replaces the previous diesel-only D5, while the brake-by-wire and mild-hybrid systems will be applied to the petrol models over the coming year.

The existing T8 Twin Engine plug-in hybrid system has also been revised and receives a boost to its battery capacity from 10.4 to 11.8 kWh.  As a result, the WLTP-certified electric-only range increases from 21.7 to 28.6 miles.

These revisions will eventually be rolled out to other 60 and 90 series cars, while the smaller XC40 will soon gain a T5 Twin Engine plug-in hybrid, later followed by a T4 Twin Engine.

Away from the engine bay, the 2020 XC90 features a revised grille and front bumper, redesigned air intakes, new wheel designs, and integrated roof-rails and exhaust tail-pipes as standard across the range.

R-Design models gain new high-gloss black exterior trim and the choice of a new Slate upholstery colour, while Inscription models feature a new chrome strip across the full width of the rear bumper.

Joining these changes are three new colours: Birch Light, Pebble Grey and Thunder Grey.

The XC90’s safety systems have been updated and now offer steering input for the City Safety and Blind Spot Information System; Oncoming Lane Mitigation is now available, while Cross Traffic Alert now includes autobrake.

The Sensus infotainment system gains a few updates, too, and now offers Android Auto as well as Apple CarPlay.

The 2020 Volvo XC90 starts production in May, and will be available to order in the UK in mid-March.  First deliveries are expected in late Q2 2019.

Prices for the 2020 XC90 start from £52,235 for the T5, while a B5 diesel mild-hybrid starts from £53,285.

Update: You can read our review of the XC90 B5 here: Volvo XC90 B5 Mild-Hybrid Review.