The Kia K4 1.8i Automatic, produced between 2014 and 2018, represents a significant entry point into the K4 (also known as the Cerato in some markets) sedan lineup. Positioned as a mainstream, family-oriented vehicle, the K4 aimed to provide a balance of affordability, practicality, and modern features. This particular variant, powered by the Nu series 1.8-liter gasoline engine paired with a six-speed automatic transmission, was designed to appeal to buyers prioritizing ease of use and fuel efficiency over outright performance. It served as a core model within the K4 range, slotting below the more powerful 2.0-liter engine options and often serving as the volume seller.
Technical Specifications
| Brand | Kia |
| Model | K4 |
| Generation | K4 |
| Type (Engine) | 1.8i (143 Hp) Automatic |
| Start of production | 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (combined) | 7.3 l/100 km (32.2 US mpg, 38.7 UK mpg, 13.7 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Maximum speed | 192 km/h (119.3 mph) |
| Emission standard | Euro 4/Euro 5 |
| Weight-to-power ratio | 9.8 kg/Hp, 102.5 Hp/tonne |
| Weight-to-torque ratio | 7.9 kg/Nm, 126.2 Nm/tonne |
| Power | 143 Hp @ 6200 rpm |
| Power per litre | 79.6 Hp/l |
| Torque | 176 Nm @ 4500 rpm (129.81 lb.-ft. @ 4500 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | Nu / G4NB |
| Engine displacement | 1797 cm3 (109.66 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 4 l (4.23 US qt | 3.52 UK qt) |
| Kerb Weight | 1395-1459 kg (3075.45 – 3216.54 lbs.) |
| Trunk (boot) space – minimum | 525 l (18.54 cu. ft.) |
| Fuel tank capacity | 62 l (16.38 US gal | 13.64 UK gal) |
| Length | 4720 mm (185.83 in.) |
| Width | 1815 mm (71.46 in.) |
| Height | 1465 mm (57.68 in.) |
| Wheelbase | 2770 mm (109.06 in.) |
| Front track | 1579 mm (62.17 in.) |
| Rear (Back) track | 1589 mm (62.56 in.) |
| Ride height (ground clearance) | 131 mm (5.16 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 |
| Front suspension | Independent type McPherson |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/60 R16 |
| Wheel rims size | 16 |
Powertrain & Engine Architecture
At the heart of the K4 1.8i Automatic lies the Kia Nu engine family, specifically the G4NB code. This 1.8-liter inline-four cylinder engine utilizes a naturally aspirated configuration and a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The engine employs multi-point fuel injection, delivering fuel directly into the intake ports. This system, while not as advanced as direct injection, provides reliable and efficient fuel delivery for everyday driving. The engine’s 143 horsepower at 6,200 rpm and 176 Nm (129.81 lb-ft) of torque at 4,500 rpm are respectable figures for its displacement and intended market segment. The six-speed automatic transmission, a common choice for this class of vehicle, provides smooth and convenient gear changes. While not offering the sportiness of a manual transmission, it prioritizes ease of driving, particularly in urban environments.
Driving Characteristics
The K4 1.8i Automatic delivers a comfortable and predictable driving experience. Acceleration is adequate for merging onto highways and navigating city streets, but it’s not designed for spirited driving. The automatic transmission is tuned for fuel efficiency, meaning it will upshift quickly to maintain lower engine speeds. This can sometimes result in a slight hesitation when requesting sudden bursts of power. Compared to the higher-output 2.0-liter K4 models, the 1.8i feels noticeably less powerful, especially when fully loaded with passengers and cargo. However, the trade-off is improved fuel economy and a more relaxed driving experience. The gear ratios are optimized for everyday usability, providing sufficient torque in most driving situations.
Equipment & Trim Levels
The K4 1.8i Automatic typically came standard with a reasonable array of features, including air conditioning, power windows and locks, a basic audio system with USB connectivity, and standard safety equipment like ABS and airbags. Higher trim levels offered upgrades such as alloy wheels, a more sophisticated audio system, a rearview camera, and features like keyless entry and push-button start. Interior upholstery was typically cloth, with optional leather available on higher trims. Dashboard configurations were generally straightforward and functional, prioritizing ease of use over elaborate design.
Chassis & Braking
The K4’s chassis utilizes an independent McPherson strut suspension in the front and an independent multi-link suspension in the rear. This setup provides a good balance of ride comfort and handling. The front brakes are ventilated discs, offering adequate stopping power, while the rear brakes are solid discs. The steering is rack and pinion with hydraulic power assistance, providing a reasonably responsive feel. The K4 1.8i, being one of the lighter variants, generally handles well, with minimal body roll in corners. The standard tire size is 205/60 R16, providing a good compromise between comfort and grip.
Market Reception & Comparison
The Kia K4 1.8i Automatic was generally well-received by critics as a practical and affordable family sedan. It was praised for its fuel efficiency, comfortable ride, and spacious interior. However, some reviewers noted that the engine lacked the power of its competitors and that the interior materials were not as premium as some other vehicles in its class. Compared to the 2.0-liter K4, the 1.8i offered significantly better fuel economy but at the expense of performance. Against competitors like the Hyundai Elantra, Ford Focus, and Toyota Corolla, the K4 1.8i offered a competitive value proposition, often undercutting its rivals in price while offering a similar level of features.
Legacy
The Kia K4 1.8i Automatic has proven to be a relatively reliable vehicle in the used car market. The Nu engine family is known for its durability, and the six-speed automatic transmission is generally dependable. Common maintenance items include regular oil changes, timing belt replacement (depending on mileage), and inspection of the suspension components. While not a particularly exciting vehicle, the K4 1.8i Automatic remains a practical and affordable option for buyers seeking a reliable and fuel-efficient compact sedan. Its simplicity and relatively low running costs make it an attractive choice for those prioritizing value and dependability over performance and luxury.
