The Kia Optima IV, specifically the 2.4 MPI (171 Hp) Sportmatic variant produced from 2018 to 2020, represents a mid-cycle refresh of the fourth-generation Optima (known as the K5 in more recent iterations). This model year saw significant styling updates and technological enhancements aimed at bolstering the Optima’s position in the highly competitive mid-size sedan segment. The 2.4 MPI Sportmatic trim occupied a sweet spot in the lineup, offering a balance between performance, features, and affordability, appealing to buyers seeking a comfortable and well-equipped daily driver. It was positioned above the base LX trim and below the more performance-oriented SX models.
Technical Specifications
| Brand | Kia |
| Model | Optima |
| Generation | Optima IV (facelift 2018) |
| Type (Engine) | 2.4 MPI (171 Hp) Sportmatic |
| Start of production | 2018 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Emission standard | Euro 5 |
| Power | 171 Hp @ 6200 rpm |
| Power per litre | 72.5 Hp/l |
| Torque | 222 Nm @ 4000 rpm / 163.74 lb.-ft. @ 4000 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | Theta II |
| 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 | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold 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 | 7 l / 7.4 US qt | 6.16 UK qt |
| Fuel tank capacity | 70 l / 18.49 US gal | 15.4 UK gal |
| Length | 4855 mm / 191.14 in. |
| Width | 1860 mm / 73.23 in. |
| Height | 1465 mm / 57.68 in. |
| Wheelbase | 2805 mm / 110.43 in. |
| Front track | 1597 mm / 62.87 in. |
| Rear (Back) track | 1604 mm / 63.15 in. |
| Front overhang | 965 mm / 37.99 in. |
| Rear overhang | 1085 mm / 42.72 in. |
| 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 Sportmatic |
| 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 |
| Power steering | Electric Steering |
| Tires size | 235/45 R18 |
| Wheel rims size | 7.5J x 18 |
Powertrain & Engine Architecture
At the heart of the 2018-2020 Kia Optima 2.4 MPI Sportmatic lies the Theta II 2.4-liter inline-four cylinder engine. This engine, a staple in the Hyundai-Kia lineup for many years, utilizes multi-port fuel injection (MPI) for efficient fuel delivery. The engine benefits from Kia’s Dual Continuous Variable Valve Timing (D-CVVT) technology, optimizing valve timing for improved performance and fuel economy across the rev range. The Theta II engine is known for its relatively simple design, contributing to its overall reliability. The engine is transversely mounted in the front of the vehicle. Paired with this engine is a six-speed automatic transmission featuring Kia’s “Sportmatic” mode, allowing drivers to manually select gears for a more engaging driving experience. While not a dual-clutch transmission, the Sportmatic mode provides a degree of control over gear selection.
Driving Characteristics
The 171 horsepower and 222 Nm (163.74 lb-ft) of torque produced by the 2.4-liter engine provide adequate, though not exhilarating, performance. Acceleration from 0 to 60 mph typically takes around 9-10 seconds. The six-speed automatic transmission is generally smooth-shifting, but can sometimes feel hesitant during quick overtaking maneuvers. Compared to the more powerful 2.0-liter turbocharged engine offered in the SX trim, the 2.4 MPI feels noticeably less responsive. However, it offers a more linear power delivery, making it easier to modulate in everyday driving situations. The automatic transmission’s gear ratios are tuned for fuel efficiency, prioritizing comfortable cruising over outright performance. The Sportmatic mode does offer some improvement in responsiveness, but it doesn’t transform the Optima into a sports sedan.
Equipment & Trim Levels
The 2.4 MPI Sportmatic trim came standard with a respectable array of features. Interior appointments typically included cloth upholstery, though leather options were available. Standard equipment included a 7-inch touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, a rearview camera, and automatic emergency braking. Higher trim levels added features like a larger touchscreen, a premium sound system, and heated and ventilated front seats. Optional extras for the 2.4 MPI Sportmatic included a panoramic sunroof, smart cruise control, and lane departure warning.
Chassis & Braking
The Optima IV utilizes a front-wheel-drive layout with an independent McPherson strut suspension in the front and an independent multi-link suspension in the rear. This suspension setup provides a comfortable ride quality, absorbing bumps and imperfections in the road effectively. The front brakes are ventilated discs, while the rear brakes are solid discs, providing adequate stopping power for the vehicle’s weight class. Anti-lock braking system (ABS) is standard. Stabilizer bars are present on both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The 2018-2020 Kia Optima 2.4 MPI Sportmatic was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and generous standard features. However, some reviewers noted that the engine lacked the punch of its turbocharged counterpart. Fuel economy was considered competitive for its class, achieving around 25 mpg city and 35 mpg highway. Compared to other mid-size sedans like the Toyota Camry and Honda Accord, the Optima offered a more stylish design and a longer warranty, but its resale value was typically lower. The 1.6L Turbo models offered better fuel economy, while the 2.0L Turbo models provided significantly more performance, but at a higher price point.
Legacy
The Kia Optima 2.4 MPI Sportmatic has proven to be a relatively reliable vehicle in the used car market. The Theta II engine, while not without its potential issues (such as oil consumption in some cases), is generally durable and well-supported with aftermarket parts. Regular maintenance, including oil changes and timing belt replacements (if applicable), is crucial for ensuring long-term reliability. Today, these Optimas represent a good value for buyers seeking an affordable and well-equipped mid-size sedan. Their relatively simple mechanical design makes them easier and less expensive to repair compared to more complex modern vehicles.
