The Korean flagship has been updated with new engines and interior tweaks.

Kia has refreshed its flagship Optima and will show the car for the first time at the Geneva motor show next week.

The saloon/estate range goes on sale later this year and has two new motors available: an all-new ‘U3’ 1.6-litre CRDi diesel and a 1.6-litre T-GDi turbo petrol engine.

Naturally, the design has been given a tweak too – there's a new front bumper design, incorporating new head and fog light designs. The rear lights have also been given a makeover and are now LED.

Kia's trademark 'tiger nose' grille has been given the chrome treatment, and a new paint colour, Runway Red, will also be offered, as well as new 16-,17- and 18-inch aluminium alloy wheels. The GT and GT Line models feature new LED fog lamps, 18-inch aluminium alloy wheel designs and subtle gloss black mirror caps, side sills and air intake grille, as well as distinctive new dual twin exhausts (GT Line), and chrome twin exhaust tips (GT).

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The interior has a newly designed steering wheel and a satin-chrome trim across the dashboard. Interior trim can be specified in black, two-tone black and grey cloth or leather, or you can choose a new brown cloth or leather upholstery.

Another addition to the interior is ambient lighting around the dashboard and doors, which can be switched between six different colours. The default setting is green when the car is set to eco mode, while it will glow red when the car is in sport mode. Selecting smart mode will change the ambient lighting to blue. The GT adds GT embroidery on the front seats.

The dashboard has Kia's new 7- or 8-inch touchscreen infotainment systems available, with navigation and Kia Connected Services powered by TomTom. The system also offers Apple CarPlay and Android Auto connectivity.

There's also a whole host of safety features on board the refreshed Optima, including a new driver attention warning system to combat distracted or drowsy driving, forward collision avoidance assist with pedestrian recognition, lane keep assist, high beam assist and full LED headlamps with dynamic bending light, which all combine to make the new Optima one of the safest cars in its class, says Kia.

Gallery: 2018 Kia Optima