The Hyundai Sonata VI (YF), produced from 2009 to 2012, represented a significant step forward for the South Korean automaker in the mid-size sedan segment. The YF generation, replacing the NF Sonata, aimed to offer a more sophisticated and stylish alternative to established competitors like the Toyota Camry and Honda Accord. Within the YF lineup, the 2.4-liter engine option, producing 178 horsepower, served as the mainstream offering, positioned between the base 2.0-liter engine and the more powerful 3.5-liter V6. This variant was primarily targeted at buyers seeking a balance of fuel efficiency, reasonable performance, and a comfortable driving experience. The 2.4L engine was available with both a six-speed manual and a six-speed automatic transmission, with the automatic being the more popular choice in the North American market.
Technical Specifications
| Brand | Hyundai |
| Model | Sonata |
| Generation | Sonata VI (YF) |
| Type (Engine) | 2.4 (178 Hp) |
| Start of production | 2009 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 11 l/100 km (21.4 US mpg) |
| Fuel consumption (extra urban) | 6.1 l/100 km (38.6 US mpg) |
| Fuel consumption (combined) | 7.9 l/100 km (29.8 US mpg) |
| CO2 emissions | 192 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.1 sec |
| Acceleration 0 – 62 mph | 9.1 sec |
| Acceleration 0 – 60 mph | 8.6 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Weight-to-power ratio | 7.9 kg/Hp |
| Weight-to-torque ratio | 6.2 kg/Nm |
| Power | 178 Hp @ 6000 rpm |
| Torque | 228 Nm @ 4000 rpm (168.16 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | Theta II / G4KE |
| 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.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC, CVVT |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1413 kg (3115.13 lbs.) |
| Max. weight | 1980 kg (4365.15 lbs.) |
| Max load | 567 kg (1250.02 lbs.) |
| Trunk (boot) space – minimum | 523 l (18.47 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Length | 4820 mm (189.76 in.) |
| Width | 1835 mm (72.24 in.) |
| Height | 1470 mm (57.87 in.) |
| Wheelbase | 2795 mm (110.04 in.) |
| Front track | 1597 mm (62.87 in.) |
| Rear track | 1597 mm (62.87 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle | 10.9 m (35.76 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| 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 |
| Tires size | 205/65 R16 |
| Wheel rims size | 6.5J x 16 |
Powertrain & Engine Architecture
The heart of this Sonata variant is the Hyundai Theta II 2.4-liter inline-four cylinder engine, designated G4KE. This engine represented a significant upgrade over previous Hyundai four-cylinder offerings, incorporating dual continuously variable valve timing (CVVT) on both intake and exhaust camshafts. This technology improved both power delivery and fuel efficiency. The engine utilizes a multi-port fuel injection system, delivering fuel directly into the intake ports. The 2.4L engine produced 178 horsepower at 6000 rpm and 168 lb-ft of torque at 4000 rpm. Paired with the six-speed automatic transmission, the engine offered smooth and predictable shifts. The automatic transmission featured ‘Shiftronic’ manual control, allowing drivers to select gears for more spirited driving. The transmission was tuned for comfort and fuel economy, with relatively conservative gear ratios.
Driving Characteristics
The 2.4-liter Sonata with the automatic transmission provided a comfortable and refined driving experience. Acceleration from 0-60 mph took approximately 8.6 seconds, which was adequate for everyday driving but not particularly sporty. The automatic transmission’s programming prioritized smooth transitions and fuel efficiency over aggressive shifting. Compared to the six-speed manual version, the automatic offered less driver engagement but greater convenience. The 2.4L engine felt less strained than the base 2.0L engine when fully loaded or climbing hills. However, it lacked the outright power of the 3.5-liter V6, which offered significantly quicker acceleration. The steering was light and easy, making it well-suited for city driving, but lacked the feedback desired by more enthusiastic drivers.
Equipment & Trim Levels
The 2.4-liter Sonata typically came standard with features such as air conditioning, power windows and locks, a CD player with auxiliary input, and basic cloth upholstery. Higher trim levels, such as the Limited, added features like leather upholstery, a sunroof, upgraded audio system, and automatic climate control. Optional extras included a navigation system, rearview camera, and heated front seats. Safety features like ABS, traction control, and multiple airbags were standard across all trims.
Chassis & Braking
The YF Sonata utilized 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 provided a comfortable ride quality, absorbing bumps and imperfections in the road effectively. The front brakes were ventilated discs, while the rear brakes were solid discs. ABS (Anti-lock Braking System) was standard, enhancing braking performance and stability. The Sonata’s chassis was designed to provide a balance of rigidity and weight reduction, contributing to its overall handling characteristics.
Market Reception & Comparison
The 2.4-liter Sonata was generally well-received by automotive critics as a competent and value-packed mid-size sedan. It was praised for its spacious interior, comfortable ride, and generous standard features. However, some critics noted that its styling was somewhat conservative compared to some of its rivals. Compared to the 2.0-liter base model, the 2.4L offered a noticeable improvement in performance. Compared to the 3.5-liter V6, it provided better fuel economy but less power. The 2.4L automatic offered competitive fuel economy figures, averaging around 29.8 US mpg in combined driving, making it an attractive option for budget-conscious buyers.
Legacy
The Hyundai Sonata YF, particularly the 2.4-liter variant, proved to be a reliable and durable vehicle. The Theta II engine, while not without its issues (some early models experienced oil consumption problems), generally held up well over time with proper maintenance. Today, used YF Sonatas are readily available and often represent a good value for buyers seeking an affordable and practical mid-size sedan. The 2.4L automatic combination remains a popular choice due to its balance of fuel efficiency, reliability, and ease of use. The YF Sonata played a crucial role in establishing Hyundai as a major player in the North American automotive market, demonstrating the brand’s commitment to quality and innovation.
