The Kia K9 II 3.8 GDI V6 Automatic, produced from April 2018 to May 2021, represents Kia’s second-generation flagship sedan. Positioned as a luxury offering, the K9 II aimed to compete with established brands in the full-size segment. This particular variant, equipped with the 3.8-liter gasoline direct injection (GDI) V6 engine and an eight-speed automatic transmission, served as the entry point into the K9 II lineup in many markets, offering a balance of performance and value. It was primarily sold in South Korea, the United States, and select export markets, representing Kia’s ambition to elevate its brand image and challenge traditional luxury automakers.
Technical Specifications
| Brand | Kia |
| Model | K9 |
| Generation | K9 II |
| Type (Engine) | 3.8 GDI V6 (315 Hp) Automatic |
| Start of production | April, 2018 |
| End of production | May, 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 12.8-13.1 l/100 km (18.4 – 18 US mpg, 22.1 – 21.6 UK mpg, 7.8 – 7.6 km/l) |
| Fuel consumption (extra urban) | 9.1-9.3 l/100 km (25.8 – 25.3 US mpg, 31 – 30.4 UK mpg, 11 – 10.8 km/l) |
| Fuel consumption (combined) | 11.1-11.3 l/100 km (21.2 – 20.8 US mpg, 25.4 – 25 UK mpg, 9 – 8.8 km/l) |
| CO2 emissions | 192-196 g/km |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.1 kg/Hp, 164.5 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 207.3 Nm/tonne |
| Power | 315 Hp @ 6000 rpm |
| Power per litre | 83.4 Hp/l |
| Torque | 397 Nm @ 5000 rpm (292.81 lb.-ft. @ 5000 rpm) |
| Engine Model/Code | G6DJ |
| Engine displacement | 3778 cm3 (230.55 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Kerb Weight | 1915-1935 kg (4221.85 – 4265.94 lbs.) |
| Length | 5120 mm (201.57 in.) |
| Width | 1915 mm (75.39 in.) |
| Height | 1490 mm (58.66 in.) |
| Wheelbase | 3105 mm (122.24 in.) |
| Front track | 1629-1639 mm (64.13 – 64.53 in.) |
| Rear track | 1639-1959 mm (64.53 – 77.13 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 8 |
| Gearbox type | Automatic transmission |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 245/50 R18; 245/45 R19 98W; 275/40 R19 101W |
| Wheel rims size | 18; 19 |
Powertrain & Engine Architecture
The heart of the K9 II 3.8 GDI is the G6DJ engine, a 3.8-liter naturally aspirated V6. This engine utilizes gasoline direct injection (GDI) technology, where fuel is injected directly into the combustion chamber, improving efficiency and power output. The engine features a dual overhead camshaft (DOHC) valvetrain with four valves per cylinder. The GDI system operates at high pressure, requiring a robust fuel pump and precise injector control. The eight-speed automatic transmission, sourced from ZF, was chosen for its smooth shifting characteristics and efficiency. This transmission features a wide gear ratio spread, optimizing both acceleration and highway cruising. The transmission is electronically controlled, adapting shift points based on driving conditions and driver input.
Driving Characteristics
The 315 horsepower and 292.81 lb-ft of torque delivered by the 3.8 GDI V6 provide adequate performance for a full-size luxury sedan. While not as overtly sporty as some competitors, the K9 II offers a comfortable and refined driving experience. Acceleration from 0 to 60 mph is estimated around 6.5 seconds. The eight-speed automatic transmission contributes to smooth gear changes, although it can sometimes feel hesitant during quick downshifts. Compared to the available 5.0-liter V8 engine in higher trims, the 3.8 GDI offers a more fuel-efficient option, albeit with a noticeable reduction in overall power and acceleration. The rear-wheel-drive configuration provides a balanced feel, although it lacks the all-weather capability of all-wheel-drive systems found in some competing models.
Equipment & Trim Levels
The K9 II 3.8 GDI typically came well-equipped, even in its base trim. Standard features often included leather upholstery, power-adjustable front seats with heating and ventilation, a large touchscreen infotainment system with navigation, a premium sound system, and a suite of advanced driver-assistance systems (ADAS) such as adaptive cruise control, lane departure warning, and automatic emergency braking. Optional extras included a rear-seat entertainment system, a panoramic sunroof, and upgraded interior trim materials. The interior design emphasized luxury and spaciousness, with a focus on high-quality materials and a comfortable cabin layout.
Chassis & Braking
The K9 II utilizes an independent multi-link suspension system at both the front and rear, providing a comfortable ride and good handling characteristics. The suspension is tuned for comfort, prioritizing smoothness over outright sportiness. Ventilated disc brakes are standard on all four wheels, providing adequate stopping power. The anti-lock braking system (ABS) and electronic stability control (ESC) are standard safety features. The K9 II’s chassis is designed for rigidity, minimizing body roll and enhancing overall stability. The rear track width is wider than the front, contributing to a more planted feel during cornering.
Market Reception & Comparison
The K9 II 3.8 GDI received mixed reviews from automotive critics. While praised for its luxurious interior, comfortable ride, and generous standard features, it was often criticized for its lack of brand recognition and its relatively uninspired styling compared to established luxury rivals. Fuel economy was considered average for its class, with combined figures around 21 mpg. Reliability reports have been generally positive, although some owners have reported minor issues with the infotainment system. Compared to the V8-powered K9 II trims, the 3.8 GDI offered a more affordable entry point into the K9 II range, appealing to buyers who prioritized value and fuel efficiency over outright performance.
Legacy
The Kia K9 II 3.8 GDI V6 Automatic, while not a massive sales success, played a significant role in Kia’s efforts to establish itself as a legitimate luxury brand. The G6DJ engine proved to be a reliable and durable powerplant, and the eight-speed automatic transmission provided smooth and efficient operation. On the used car market, the K9 II 3.8 GDI represents a compelling value proposition, offering a spacious and well-equipped luxury sedan at a significantly lower price point than its European and Japanese competitors. Its long-term reliability appears to be good, making it a potentially attractive option for buyers seeking a comfortable and affordable full-size sedan.
