The Kia Optima III, produced between 2010 and 2013, represented a significant step forward for the Korean automaker in the mid-size sedan segment. The 2.4 GDI (Gasoline Direct Injection) variant, equipped with a six-speed automatic transmission, was a key offering within the Optima III lineup. This configuration aimed to balance fuel efficiency with respectable performance, positioning itself as a mainstream choice for families and commuters. It served as a bridge between the base 2.0L models and the more performance-oriented turbocharged variants, offering a compelling package for buyers prioritizing a smooth driving experience and modern features.
Technical Specifications
| Brand | Kia |
| Model | Optima |
| Generation | Optima III |
| Type (Engine) | 2.4 GDI (194 Hp) Automatic |
| Start of production | 2010 |
| End of production | 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (combined) | 8.7 l/100 km (27 US mpg, 32.5 UK mpg, 11.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.5 kg/Hp, 132.7 Hp/tonne |
| Weight-to-torque ratio | 6 kg/Nm, 167.6 Nm/tonne |
| Power | 194 Hp @ 6300 rpm |
| Power per litre | 82.2 Hp/l |
| Torque | 245 Nm @ 4200 rpm (180.7 lb.-ft. @ 4200 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | G4KJ |
| Engine displacement | 2359 cm3 (143.96 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 88 mm (3.46 in.) |
| Piston Stroke | 97 mm (3.82 in.) |
| Compression ratio | 11.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC, D-CVVT |
| Engine oil capacity | 4.8 l (5.07 US qt | 4.22 UK qt) |
| Coolant | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1462 kg (3223.16 lbs.) |
| Max. weight | 2030 kg (4475.38 lbs.) |
| Max load | 568 kg (1252.23 lbs.) |
| Trunk (boot) space – minimum | 436 l (15.4 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Length | 4845 mm (190.75 in.) |
| Width | 1830 mm (72.05 in.) |
| Height | 1455 mm (57.28 in.) |
| Wheelbase | 2795 mm (110.04 in.) |
| Front track | 1595 mm (62.8 in.) |
| Rear (Back) track | 1595 mm (62.8 in.) |
| Front overhang | 965 mm (37.99 in.) |
| Rear overhang | 1085 mm (42.72 in.) |
| Drag coefficient (Cd) | 0.285 |
| Minimum turning circle (turning diameter) | 10.9 m (35.76 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 215/55 R17 |
| Wheel rims size | 6.5J x 17 |
Powertrain & Engine Architecture
The heart of the Optima III 2.4 GDI Automatic is the G4KJ engine, a 2.4-liter inline-four cylinder powerplant. This engine utilizes Gasoline Direct Injection (GDI) technology, where fuel is injected directly into the combustion chamber, allowing for more precise fuel control and increased efficiency. The G4KJ features a double overhead camshaft (DOHC) valvetrain with Kia’s Dual Continuously Variable Valve Timing (D-CVVT) system. D-CVVT optimizes valve timing based on engine load and speed, further enhancing performance and fuel economy. The engine produces 194 horsepower at 6300 rpm and 245 Nm (180.7 lb-ft) of torque at 4200 rpm. The six-speed automatic transmission, while not offering the sporty engagement of a manual, provides smooth and predictable shifts, catering to a broader range of drivers. It’s a conventional torque converter automatic, prioritizing comfort and ease of use over outright performance.
Driving Characteristics
The 2.4 GDI automatic Optima delivers a comfortable and refined driving experience. Acceleration is adequate for everyday driving, with the engine providing sufficient power for merging onto highways and passing slower vehicles. However, it doesn’t offer the brisk acceleration of the turbocharged 2.0T models. The automatic transmission is well-tuned, offering smooth gear changes and a responsive feel. The gear ratios are optimized for fuel efficiency, with higher gears engaged at lower speeds. Compared to a manual transmission equipped Optima 2.4, the automatic sacrifices some driver control and responsiveness, but gains in convenience. The weight of the vehicle (approximately 3223 lbs) is noticeable, particularly during spirited driving, but the suspension does a good job of managing body roll.
Equipment & Trim Levels
The 2.4 GDI Automatic trim typically included a generous array of standard features. These commonly included air conditioning, power windows and locks, a six-speaker audio system with USB and auxiliary inputs, and a tilt/telescoping steering wheel. Higher trim levels, such as the Limited, added features like leather upholstery, a sunroof, heated front seats, and a premium audio system. Optional extras often included a navigation system, rearview camera, and keyless entry. Interior upholstery was typically cloth on the base models, with leather available on higher trims. The dashboard layout was modern and functional, with a clear instrument cluster and intuitive controls.
Chassis & Braking
The Optima III utilizes a front-wheel-drive layout. The front suspension consists of independent McPherson struts with coil springs and an anti-roll bar, while the rear suspension employs an independent multi-link setup with a stabilizer bar. This suspension configuration provides a good balance between ride comfort and handling. Braking duties are handled by ventilated discs at the front and solid discs at the rear. Anti-lock Braking System (ABS) is standard, enhancing safety during emergency braking situations. The steering is a rack and pinion system, providing precise and responsive steering feel.
Market Reception & Comparison
The Kia Optima III 2.4 GDI Automatic was generally well-received by automotive critics. It was praised for its stylish design, spacious interior, and comfortable ride. The 2.4 GDI engine was considered a good compromise between performance and fuel economy. Compared to other mid-size sedans in its class, such as the Toyota Camry and Honda Accord, the Optima offered a more distinctive design and a more generous features list for the price. However, some critics noted that the interior materials weren’t quite as refined as those found in its Japanese competitors. Fuel economy was competitive, averaging around 27 mpg in combined driving. Reliability was generally good, although some owners reported minor issues with the GDI fuel injection system.
Legacy
The Kia Optima III 2.4 GDI Automatic has proven to be a relatively reliable and durable vehicle. The G4KJ engine, while not without its quirks (some early GDI engines experienced carbon buildup issues), has generally held up well over time. On the used car market, these Optimas represent a good value proposition, offering a lot of features and comfort for the price. Maintenance costs are generally reasonable, although regular servicing, including fuel injector cleaning, is recommended to prevent potential issues with the GDI system. The Optima III helped to establish Kia as a serious contender in the mid-size sedan segment, paving the way for future generations of the Optima and solidifying Kia’s reputation for quality and value.
