Hyundai Sigma engine

The Hyundai Sigma engine family began life with the simple V6 name. Displacement ranges from 2.5 to 3.5 L (2,497 to 3,497 cc).

Σ engine
Hyundai Motor Company logo.svg  Sigma engine
Overview
ManufacturerHyundai Motor Company
Layout
ConfigurationV6
Displacement2.5 L; 152.4 cu in (2,497 cc)
3.0 L; 181.4 cu in (2,972 cc)
3.5 L; 213.4 cu in (3,497 cc)
Cylinder bore83.5 mm (3.29 in)
91.1 mm (3.59 in)
93 mm (3.66 in)
Piston stroke76 mm (2.99 in)
85.8 mm (3.38 in)
Block materialCast iron
Head materialAluminum
ValvetrainSOHC, DOHC 4 valves x cyl.
Combustion
Fuel systemMulti-port fuel injection
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output160–217 hp (119–162 kW; 162–220 PS)
Torque output204–314 N⋅m (150–232 lb⋅ft)

2.5Edit

The DOHC G6AV (also called the 2.5 D) is the small 2,497 cc (2.5 L; 152.4 cu in) version. Bore is 83.5 mm (3.29 in) and stroke is shared with the 3.0 L (2,972 cc) at 76 mm (2.99 in). Output is 160 hp (119 kW; 162 PS) at 6000 rpm and 204 N⋅m (150 lb⋅ft) at 4500 rpm.

3.0Edit

The DOHC G6AT and G6CT (also called the 3.0 D) both displace 2,972 cc (3.0 L; 181.4 cu in). They share the 2.5's 76 mm (2.99 in) stroke but use a larger 91.1 mm (3.59 in) bore. Output for the older G6AT is 182 hp (136 kW; 185 PS) at 6000 rpm and 241 N⋅m (178 lb⋅ft) at 4500 rpm, while the G6CT produces 189 hp (141 kW; 192 PS) at 6000 rpm and 260 N⋅m (192 lb⋅ft) at 4000 rpm.

The older SOHC G6AT 3.0 S produces just 158 hp (118 kW; 160 PS) at 5000 rpm and 240 N⋅m (177 lb⋅ft) at 3000 rpm.

Applications(US)

Applications(Korea)

3.5Edit

The G6AU and G6CU (both also called the 3.5 D ) are the large 3,497 cc (3.5 L; 213.4 cu in) versions of the Sigma engine. Bore and stroke are both larger at 93 mm × 85.8 mm (3.66 in × 3.38 in), respectively. Output is 200 hp (149 kW; 203 PS) at 5500 rpm and 290 N⋅m (214 lb⋅ft) at 4800 rpm for the older G6AU V6 and 217 hp (162 kW; 220 PS) at 5500 rpm and 314 N⋅m (232 lb⋅ft) at 3500 rpm for the new G6CU Sigma.

The 3.5 D has a cast iron engine block and aluminum DOHC cylinder heads. It uses Multi-port fuel injection, has 4 valves per cylinder, and features forged steel connecting rods. It is designed to run on "regular" unleaded gasoline rather than the premium fuel used in many other high-output V6 engines.

The US-market version produces 194 hp (145 kW; 197 PS) at 5500 rpm with 297 N⋅m (219 lb⋅ft) of torque at 3500 rpm. It was introduced with the Kia Sedona minivan in 2001.

Applications(US)

Applications(Korea)

Applications(Kia)

This Engine is no longer used by Kia/Hyundai automotive group.

See alsoEdit