2018 Kia Optima IV (facelift 2018) Dimensions, Size & Specs

The height of the Kia Optima IV facelift from 2018 ranges between 1460 and 1466 mm (57.5 to 57.7 inches), giving it a sleek sedan profile. Its ground clearance, also referenced as ride height, varies between 130 and 135 mm (5.1 to 5.3 inches). This ground clearance is typical for sedans and strikes a balance between sporty handling and practical usability. It allows comfortable driving over speed bumps and urban road obstacles while providing sufficient stability and road grip during higher-speed maneuvers.

The curb weight of the Kia Optima IV facelift (2018–2020) ranges from 1465 kg to 1705 kg (approximately 3229 to 3758 lbs), depending on the specific trim and options installed. This weight range reflects the inclusion of various engine choices, safety features, and interior equipment. A moderate curb weight like this supports stable road behavior and increased occupant protection. However, heavier versions may experience slightly lower fuel efficiency compared to lighter trims, although the vehicle’s engineering seeks to optimize performance, delivering a smooth and balanced driving experience regardless of weight.

The maximum permissible weight of the Kia Optima IV facelift (2018) ranges from 2050 kg to 2200 kg (approximately 4519 to 4850 lbs), depending on the vehicle configuration. This figure includes the curb weight plus the maximum allowable load consisting of passengers, cargo, and any additional equipment. This maximum weight capacity ensures the vehicle maintains structural integrity, safe handling, and braking performance under fully loaded conditions. It also reflects the car’s design balance between comfort, utility, and safety. When loading cargo or passengers, it’s essential to stay within this limit to ensure optimal vehicle performance and regulatory compliance.

The luggage or trunk capacity of the Kia Optima IV facelift varies between 307 liters and 510 liters (approximately 10.8 to 18 cubic feet). This range depends on whether the rear seats are upright or folded down to expand cargo space. The smaller figure (307 liters) represents the standard trunk volume with all seats in use, providing ample space for everyday shopping bags or suitcases suitable for a family sedan. By folding the rear seats forward, the cargo volume increases significantly to 510 liters, offering additional versatility for transporting larger items like sports equipment or luggage for long trips.

The Kia Optima IV facelift offers a range of wheel sizes including 16-inch (6.5J x 16), 17-inch (7.0J x 17 and 7J x 17), and 18-inch options (7.5J x 18, 7.5J x 17, 17, and 18 variants). Corresponding tire sizes include 205/65 R16, 215/55 R17, 235/45 R18, and 215/60 R16. Larger 18-inch wheels with lower profile tires generally provide firmer road feedback and sportier handling characteristics but may slightly reduce ride comfort on rough roads. Smaller 16-inch and 17-inch wheels with taller sidewalls favor a more comfortable and cushioned ride by absorbing more road irregularities. These options allow buyers to choose between sportiness and comfort based on personal preferences.

Yes, the Kia Optima IV facelift fits comfortably into a standard home garage. Most residential garages have internal dimensions of at least 2.4 meters (7.9 feet) in width and 5.4 meters (17.7 feet) in length. With the Optima’s length being just under 4.86 meters (15.9 feet) and width of approximately 1.86 meters (6.1 feet) without mirrors, it leaves ample clearance for opening doors and maneuvering inside the garage. Even with mirrors extended to 2.12 meters (6.95 feet), most garages provide enough space to park safely without risk of damage. This makes the Optima practical for typical home parking environments.

Compared to the Kia Optima III, the Optima IV facelift 2018 grows slightly in length and width, enhancing interior space and design presence. The Optima IV measures approximately 4855 mm (191.1 inches) in length, which is about 40 to 60 mm longer than the Optima III, and its width at around 1860 mm (73.2 inches) is similarly increased by roughly 20 mm. These dimensional increases contribute to a more spacious cabin and improved road stance without dramatically changing the vehicle's parking footprint. Additionally, the facelift model features refined styling cues, modernized technology, and updated interior materials, offering an evolution in both comfort and aesthetics.

The Kia Optima IV facelift (2018) is competitively sized within the mid-size sedan segment, closely matching rivals like the Hyundai Sonata and Toyota Camry. For instance, the Optima’s length of about 4854-4855 mm (191.1 inches) and width around 1860 mm (73.2 inches) is comparable to the 2018 Hyundai Sonata’s 4877 mm (192 inches) length and similar width, while the Toyota Camry from comparable years measures roughly 4885 mm (192.3 inches) in length. The Optima’s ground clearance and curb weight fall within the typical ranges for its class, striking a balance of interior space, maneuverability, and ride comfort. Overall, it competes well dimensionally while providing attractive styling and strong value.

The 2018-2020 Kia Optima IV facelift brought several updates on top of the original fourth-generation model, including exterior refreshes like a redesigned front grille, updated LED lighting elements, and mild interior enhancements. Technology upgrades focused on improved infotainment systems with larger touchscreens, enhanced smartphone integration, and advanced driver-assist features such as lane keep assist and blind-spot detection. The facelift improved overall refinement with quieter cabin materials and updated suspension tuning for a smoother ride. These changes aimed to keep the Optima competitive in the increasingly technology-forward mid-size sedan segment while maintaining its strong value proposition.