The Kia Optima IV (facelift, introduced in 2018) 1.6 CRDi 136 hp variant with a dual-clutch transmission (DCT) represented a significant offering in the mid-size sedan segment. Produced from 2018 through 2020, this model aimed to balance fuel efficiency, reasonable performance, and modern technology within the broader Optima IV generation (designated as the JF platform). It served as a key volume seller for Kia in many European and Asian markets, offering a diesel-powered alternative to gasoline engines and a more sophisticated transmission option compared to traditional automatics.
Technical Specifications
| Brand | Kia |
| Model | Optima |
| Generation | Optima IV (facelift 2018) |
| Type (Engine) | 1.6 CRDi (136 Hp) DCT |
| Start of production | 2018 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 5-5.5 l/100 km (47 – 42.8 US mpg, 56.5 – 51.4 UK mpg, 20 – 18.2 km/l) |
| CO2 emissions (WLTP) | 132-143 g/km |
| Fuel consumption (economy) – urban (NEDC) | 4.7-5.2 l/100 km (50 – 45.2 US mpg, 60.1 – 54.3 UK mpg, 21.3 – 19.2 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 4-4.4 l/100 km (58.8 – 53.5 US mpg, 70.6 – 64.2 UK mpg, 25 – 22.7 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 4.3-4.8 l/100 km (54.7 – 49 US mpg, 65.7 – 58.9 UK mpg, 23.3 – 20.8 km/l) |
| CO2 emissions (NEDC) | 112-123 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 11.6 sec |
| Acceleration 0 – 62 mph | 11.6 sec |
| Acceleration 0 – 60 mph | 11.2 sec |
| Maximum speed | 195 km/h (121.17 mph) |
| Emission standard | Euro 6d-TEMP |
| Weight-to-power ratio | 11.3 kg/Hp, 88.9 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 209.2 Nm/tonne |
| Power | 136 Hp @ 4000 rpm |
| Power per litre | 85.1 Hp/l |
| Torque | 320 Nm @ 2000-2250 rpm (236.02 lb.-ft. @ 2000-2250 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | D4FE |
| Engine displacement | 1598 cm3 (97.52 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 77 mm (3.03 in.) |
| Piston Stroke | 85.8 mm (3.38 in.) |
| Compression ratio | 15.9:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 4.4 l (4.65 US qt | 3.87 UK qt) |
| Coolant | 6.9 l (7.29 US qt | 6.07 UK qt) |
| Kerb Weight | 1530-1645 kg (3373.07 – 3626.6 lbs.) |
| Max. weight | 2080 kg (4585.62 lbs.) |
| Max load | 435-550 kg (959.01 – 1212.54 lbs.) |
| Trunk (boot) space – minimum | 510 l (18.01 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| AdBlue tank | 14 l (3.7 US gal | 3.08 UK gal) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 80 kg (176.37 lbs.) |
| 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 | 1597-1607 mm (62.87 – 63.27 in.) |
| Rear (Back) track | 1604-1621 mm (63.15 – 63.82 in.) |
| Front overhang | 965 mm (37.99 in.) |
| Rear overhang | 1085 mm (42.72 in.) |
| Ride height (ground clearance) | 135 mm (5.31 in.) |
| 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 | 7 gears, automatic transmission DCT |
| 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 | 215/60 R16; 215/55 R17; 235/45 R18 |
| Wheel rims size | 6.5J x 16; 7.5J x 17; 7.5J x 18 |
INTRODUCTION
The Kia Optima IV, launched in 2015 and facelifted in 2018, represented a significant step forward for the Korean automaker in terms of design, technology, and overall refinement. The 1.6 CRDi 136 hp DCT variant, introduced with the facelift, was positioned as a fuel-efficient and technologically advanced option within the Optima lineup. It aimed to appeal to buyers seeking a comfortable and practical mid-size sedan with lower running costs. This engine and transmission combination was particularly popular in European markets where diesel engines held a strong presence, and automatic transmissions were becoming increasingly desirable.
Powertrain & Engine Architecture
The heart of this Optima variant is the D4FE 1.6-liter four-cylinder diesel engine. This engine utilizes a common-rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. The engine features a turbocharger with an intercooler, boosting power output and improving torque delivery. The D4FE engine boasts a relatively high compression ratio of 15.9:1, contributing to its efficiency. The dual-clutch transmission (DCT), a 7-speed unit, provides quicker and smoother gear changes compared to a traditional torque-converter automatic. This DCT is crucial for maximizing the engine’s efficiency and providing a more engaging driving experience. The engine is transversely mounted in the front of the vehicle, driving the front wheels.
Driving Characteristics
The 1.6 CRDi 136 hp/DCT combination delivers adequate performance for everyday driving. Acceleration from 0-100 km/h takes around 11.6 seconds, which is not particularly brisk but sufficient for most commuting and highway scenarios. The DCT transmission helps to keep the engine in its optimal power band, providing responsive acceleration. However, compared to higher-output Optima variants (like the 2.0-liter gasoline engine), this version feels less powerful, especially when fully loaded or tackling steep inclines. The DCT’s gear ratios are tuned for fuel efficiency, meaning it prioritizes lower engine speeds at cruising speeds. This contributes to good fuel economy but can sometimes result in the engine feeling slightly strained during quick overtaking maneuvers. The steering is light and precise, making it easy to maneuver in urban environments.
Equipment & Trim Levels
The 1.6 CRDi DCT Optima typically came equipped with a respectable level of standard features. These generally included air conditioning, power windows, central locking, a touchscreen infotainment system with Bluetooth connectivity, and alloy wheels. Higher trim levels added features such as leather upholstery, a panoramic sunroof, heated front seats, a navigation system, and advanced driver-assistance systems (ADAS) like lane departure warning and automatic emergency braking. Interior upholstery was typically cloth on base models, with leather options available on higher trims. Dashboard configuration was consistent across the range, featuring a modern and user-friendly design.
Chassis & Braking
The Optima IV utilizes a McPherson strut front suspension and a multi-link rear suspension, providing a comfortable and controlled ride. Stabilizer bars are fitted to both axles to reduce body roll during cornering. 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. The suspension tuning is geared towards comfort rather than outright sportiness, prioritizing a smooth ride over sharp handling. The chassis is designed to provide a stable and predictable driving experience.
Market Reception & Comparison
The 1.6 CRDi DCT Optima received generally positive reviews from automotive critics. It was praised for its fuel efficiency, comfortable ride, and well-equipped interior. However, some reviewers noted that the engine could feel underpowered at times, particularly when compared to gasoline-powered rivals. Compared to the 2.0-liter gasoline Optima, the 1.6 CRDi offered significantly better fuel economy but less outright performance. Against other diesel-powered competitors in the mid-size segment, the Optima offered a compelling combination of value, features, and efficiency. Reliability reports suggest that the D4FE engine and DCT transmission are generally reliable, although regular maintenance is crucial.
Legacy
The Kia Optima IV 1.6 CRDi DCT has established itself as a reliable and economical used car option. The D4FE engine, while not known for blistering performance, is generally durable and capable of high mileage with proper maintenance. The DCT transmission, if serviced according to Kia’s recommendations, is also relatively reliable. Today, these Optimas represent a good value proposition for buyers seeking a comfortable, fuel-efficient, and well-equipped mid-size sedan. The combination of diesel efficiency and automatic convenience continues to appeal to a segment of the used car market.
