The Kia Optima I LX 2.5 V6 Automatic, produced from 2000 to 2001, represented Kia’s initial foray into the mid-size sedan segment with a focus on offering a more upscale experience at a competitive price point. This variant occupied the upper echelon of the first-generation Optima (codenamed B4), positioned above the base 2.5L inline-four models and serving as a more premium alternative before the introduction of higher trim levels in later years. It was a key model for Kia as they sought to establish a stronger presence in the North American market, aiming to challenge established Japanese and American brands. The Optima I was based on the Hyundai Sonata platform, reflecting the close relationship between the two manufacturers at the time.
Technical Specifications
| Brand | Kia |
| Model | Optima |
| Generation | Optima I |
| Type | LX 2.5 V6 (172 Hp) Automatic |
| Start of production | 2000 |
| End of production | 2001 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.7 kg/Hp, 115.1 Hp/tonne |
| Weight-to-torque ratio | 6.5 kg/Nm, 153.2 Nm/tonne |
| Power | 172 Hp @ 6000 rpm |
| Power per litre | 69 Hp/l |
| Torque | 229 Nm @ 4500 rpm (168.9 lb.-ft. @ 4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 2494 cm3 (152.19 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 75 mm (2.95 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Kerb Weight | 1495 kg (3295.91 lbs.) |
| Max. weight | 1855 kg (4089.57 lbs.) |
| Max load | 360 kg (793.66 lbs.) |
| Trunk (boot) space – minimum | 368 l (13 cu. ft.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Length | 4722 mm (185.91 in.) |
| Width | 1815 mm (71.46 in.) |
| Height | 1410 mm (55.51 in.) |
| Wheelbase | 2700 mm (106.3 in.) |
| Front track | 1540 mm (60.63 in.) |
| Rear (Back) track | 1530 mm (60.24 in.) |
| Minimum turning circle | 10.4 m (34.12 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 | 4 gears, automatic transmission |
| Front suspension | Wishbone |
| Rear suspension | Coil spring |
| 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 | 195/70 R14; 205/60 R15 |
| Wheel rims size | 14; 15 |
Powertrain & Engine Architecture
The heart of the Optima I LX 2.5 V6 was the 2.5-liter DOHC V6 engine. This engine, internally designated as the Sigma, was a naturally aspirated powerplant utilizing multi-port fuel injection. The 60-degree V-configuration aimed to provide a balance between smooth operation and compact dimensions. The engine produced 172 horsepower at 6000 rpm and 229 Nm (168.9 lb-ft) of torque at 4500 rpm. The engine’s design emphasized reliability and ease of maintenance, typical of Korean automotive engineering at the time. The four-speed automatic transmission was a conventional hydraulic unit, chosen for its smoothness and affordability. While not offering the responsiveness of a manual transmission, it was well-suited to the intended market of comfort-oriented drivers.
Driving Characteristics
The 172 hp V6, coupled with the four-speed automatic, provided adequate, though not exhilarating, performance. Acceleration from 0 to 60 mph was estimated to be around 9-10 seconds. The automatic transmission’s gear ratios were tuned for comfortable cruising rather than aggressive acceleration. Compared to the base 2.5L inline-four Optima, the V6 offered a noticeable improvement in power and responsiveness, particularly during highway merging and overtaking maneuvers. However, it lacked the sporty feel of a manual transmission or the higher output of potential future upgrades. The front-wheel-drive configuration provided predictable handling, but the Optima I wasn’t designed to be a corner carver.
Equipment & Trim Levels
The LX trim level, as equipped with the 2.5 V6 and automatic transmission, came standard with features considered fairly generous for its price point in 2000-2001. These included air conditioning, power windows and locks, a CD player, and cloth upholstery. Optional extras included a sunroof, upgraded audio system, and alloy wheels. The interior design was functional and straightforward, prioritizing usability over luxury. The dashboard layout was clean and easy to navigate, with clearly labeled controls. Safety features included dual front airbags and ABS brakes.
Chassis & Braking
The Optima I utilized a front-wheel-drive layout with an independent wishbone front suspension and a coil spring rear suspension. This setup provided a reasonably comfortable ride, absorbing bumps and imperfections in the road surface effectively. The front brakes were ventilated discs, offering good stopping power, while the rear brakes were solid discs. The steering was rack-and-pinion with hydraulic power assistance, providing light and easy steering feel. Tire sizes varied depending on the wheel size, with 195/70 R14 or 205/60 R15 tires being common.
Market Reception & Comparison
The Kia Optima I LX 2.5 V6 Automatic was generally well-received by automotive critics as a solid value proposition. It offered a compelling combination of features, performance, and price. Compared to its competitors, such as the Honda Accord and Toyota Camry, the Optima I was often seen as offering more equipment for the money. However, it lacked the established reputation for reliability and refinement of the Japanese brands. Fuel economy was average for its class, with EPA estimates around 20 mpg city and 28 mpg highway. The V6 engine consumed more fuel than the base inline-four, but provided a noticeable performance advantage.
Legacy
The Kia Optima I, particularly the 2.5 V6 Automatic variant, played a significant role in establishing Kia as a viable competitor in the mid-size sedan market. While not known for exceptional long-term reliability issues, the Sigma V6 engine proved to be reasonably durable with proper maintenance. Today, these vehicles are relatively rare and often sought after by enthusiasts looking for an affordable and unique classic. Parts availability can be a challenge, but many components are shared with Hyundai models, making sourcing replacements easier. The Optima I LX 2.5 V6 Automatic represents a pivotal moment in Kia’s history, demonstrating their ambition to offer a compelling alternative to established automotive brands.
