The Hyundai Sonata IV (EF series), particularly the facelifted version introduced in 2001, represented a significant step forward for the South Korean automaker in the mid-size sedan segment. Produced from 2001 to 2004, the EF Sonata aimed to compete directly with established Japanese and American rivals like the Toyota Camry and Honda Accord. The 2.7L V6 GLS model, generating 173 horsepower, occupied a mid-range position within the Sonata lineup, offering a balance of performance and features aimed at family buyers seeking a more refined driving experience than the base 2.4L four-cylinder models. This variant was primarily sold in the North American market, where V6 engines were highly favored.
Technical Specifications
| Brand | Hyundai |
| Model | Sonata |
| Generation | Sonata IV (EF, facelift 2001) |
| Type (Engine) | 2.7 V6 GLS (173 Hp) |
| Start of production | 2001 |
| End of production | 2004 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 13.6 l/100 km (17.3 US mpg) |
| Fuel consumption (extra urban) | 7.4 l/100 km (31.8 US mpg) |
| Fuel consumption (combined) | 9.7 l/100 km (24.2 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.2 sec |
| Acceleration 0 – 62 mph | 8.2 sec |
| Acceleration 0 – 60 mph | 7.8 sec |
| Maximum speed | 220 km/h (136.7 mph) |
| Emission standard | Euro 3 |
| Weight-to-power ratio | 8.3 kg/Hp |
| Weight-to-torque ratio | 5.8 kg/Nm |
| Power | 173 Hp @ 6000 rpm |
| Torque | 245 Nm @ 4000 rpm (180.7 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | Delta / G6BA |
| Engine displacement | 2656 cm3 (162.08 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 86.7 mm (3.41 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 |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Kerb Weight | 1428 kg (3148.2 lbs.) |
| Max. weight | 2020 kg (4453.34 lbs.) |
| Max load | 592 kg (1305.14 lbs.) |
| Trunk (boot) space – minimum | 430 l (15.19 cu. ft.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Length | 4747 mm (186.89 in.) |
| Width | 1820 mm (71.65 in.) |
| Height | 1422 mm (55.98 in.) |
| Wheelbase | 2700 mm (106.3 in.) |
| Front track | 1540 mm (60.63 in.) |
| Rear (Back) track | 1530 mm (60.24 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle | 11.2 m (36.75 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Drive wheel | Front wheel drive |
| Number of gears | 5 |
| Gearbox type | Manual transmission |
| 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 |
| Power steering | Hydraulic Steering |
| Tires size | 205/65 R15 |
| Wheel rims size | 15 |
Powertrain & Engine Architecture
The heart of the 2.7L GLS Sonata was the Hyundai Delta engine, specifically the G6BA code. This 60-degree V6 engine featured a cast iron block and aluminum cylinder heads. It utilized a multi-port fuel injection (MPI) system, delivering fuel directly into the intake ports just before the intake valves. The engine employed a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, contributing to its relatively high output for its displacement. The 2.7L engine was known for its smooth operation and decent power delivery. The five-speed manual transmission offered with this trim was a standard gearbox, providing a direct connection between the engine and the front wheels. The transmission’s gear ratios were tuned for a balance of acceleration and fuel efficiency, though it wasn’t particularly sporty in its feel.
Driving Characteristics
The 2.7L V6 with the five-speed manual transmission provided a noticeable step up in performance compared to the base 2.4L four-cylinder Sonata. Acceleration to 60 mph took approximately 7.8 seconds, making it competitive with other mid-size sedans of the era. The engine delivered a usable amount of torque throughout the rev range, making it easy to drive in everyday traffic. While not a sports sedan, the 2.7L offered enough power for confident highway merging and passing maneuvers. The manual transmission allowed for greater driver control, but the shift quality wasn’t as refined as some of its Japanese competitors. The suspension provided a comfortable ride, but body roll was noticeable during aggressive cornering.
Equipment & Trim Levels
The GLS trim level represented a well-equipped version of the Sonata. Standard features typically included air conditioning, power windows and locks, a CD player, and cloth upholstery. Optional extras could include a sunroof, upgraded audio system, and alloy wheels. The interior design was functional and relatively spacious, though the materials used were not as luxurious as those found in some competing models. The GLS trim aimed to provide a good value proposition, offering a solid set of features at a competitive price point.
Chassis & Braking
The Sonata IV utilized a front-wheel-drive platform 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 and decent handling characteristics. The braking system consisted of ventilated disc brakes in the front and solid disc brakes in the rear. Anti-lock braking system (ABS) was standard, enhancing safety. The steering was rack-and-pinion with hydraulic power assist, providing a reasonably responsive feel.
Market Reception & Comparison
The 2.7L V6 GLS Sonata was generally well-received by automotive critics. It was praised for its spacious interior, comfortable ride, and strong engine performance. However, some reviewers noted that the interior materials were not as refined as those found in some competing models, and the handling wasn’t as sporty. Compared to the base 2.4L four-cylinder Sonata, the 2.7L V6 offered a significant performance upgrade, but at a higher price. Fuel economy was also slightly lower with the V6 engine. Compared to rivals like the Honda Accord and Toyota Camry, the Sonata offered a more affordable alternative with a longer warranty, but it lacked the same level of brand prestige.
Legacy
The Hyundai Sonata IV, and particularly the 2.7L V6 GLS variant, played a crucial role in establishing Hyundai as a credible competitor in the mid-size sedan market. The Delta engine proved to be relatively reliable, although routine maintenance, such as timing belt replacement, was essential. Today, these Sonatas are relatively affordable on the used car market, making them a practical choice for budget-conscious buyers. While not a collector’s item, the EF Sonata represents a significant milestone in Hyundai’s history, demonstrating the company’s growing ability to produce well-rounded and competitive vehicles.
