The updated Kia Stinger has been revealed in full detail, with the high-performance fastback sports sedan boasting a range of upgrades to amplify its gran turismo character.

In addition to its refreshed design, the enhanced Kia Stinger includes Kia's latest driver assistance and safety features, as well as improved interior packaging for greater space and comfort.

For North America, the upgraded model is also now offered with a powerful new 'Smartstream' 2.5-litre turbocharged gasoline engine. The new engine sits directly between the two current gasoline powertrains, producing 300bhp at 5,800rpm.

The maximum torque of the new four-cylinder engine, at 422Nm, and is accessible from 1,650rpm to 4,000rpm, making it easy for drivers to build and maintain speed in all conditions.

The most powerful engine in the Stinger lineup, a twin-turbo 3.3-litre T-GDi V6 from Kia's 'Lambda' engine family remains unchanged, save for a new Electronic Variable Exhaust Valve system.

This feature adds a small butterfly valve in the exhaust which opens and closes, producing a more prominent, deeper exhaust note in Sport driving mode, or a quieter, more subdued exhaust note in Eco or Comfort driving mode.

Beyond enhancing sound quality, the revised exhaust flow path helps to liberate an extra 3bhp from the engine (for a total of 368bhp at 6,000rpm). Its 510Nm torque is accessible from 1,300rpm to 4,500 rpm, giving the Stinger effortless performance everywhere.

The 2.0-litre turbocharged four-cylinder 'Theta' engine is unchanged, producing 252bhp at 6,200 rpm and 353Nm of torque from 1,400rpm to 4,000rpm.

All three engines are paired with a smooth-shifting eight-speed automatic transmission, matching the car's long-legged personality.

In the cabin, the upgraded Stinger is now available with an optional new 10.25-inch touchscreen display. Bluetooth multi-connection enables users to connect up to two mobile devices at the same time - one for hands-free phone and multimedia use, and the other for media use only.

Its advanced split-screen display lets users control or monitor different vehicle features at the same time, customising the screen with a series of different widgets. The 10.25-inch system offers Apple CarPlay and Android Auto as standard, with a voice control system for many of the car's features, such as heating and ventilation, audio and navigation.

A new 8.0-inch touchscreen display with a narrow-bezel design is also available, replacing the previous 7.0-inch system. This new display also offers wireless Android Auto and Apple CarPlay connectivity depending on market.

The Kia Stinger's suite of Advanced Driver Assistance Systems has also been upgraded, so that Forward Collision-Avoidance Assist now offers protection when turning across the road into a junction by identifying oncoming traffic on the other side of the road. Furthermore, it offers increased activation range when detecting a vehicle, pedestrian or cyclist.

Lane Keeping Assist meanwhile, is now able to detect the edge of a road, as well as the lines in the road, providing steering assistance to prevent the driver leaving their lane without signaling. The Blind-Spot Collision-Avoidance Assist also now helps drivers avoid potential collisions by applying differential braking instead of simply warning drivers of cars in adjacent lanes on the highway.