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Hyundai Epsilon engine
Hyundai Epsilon 999cc L4 engine (G4HC)
Overview
Manufacturer	Hyundai Motor Company
Layout
Configuration	Straight-3 Straight-4
Displacement	0.8 L (798 cc) 0.8 L (813 cc) 1.0 L (999 cc) 1.1 L (1,086 cc)
Cylinder bore	63 mm (2.48 in) 66 mm (2.6 in) 67 mm (2.64 in)
Piston stroke	64 mm (2.52 in) 73 mm (2.87 in) 77 mm (3.03 in)
Valvetrain	SOHC 2 or 3 valves x cyl.
Combustion
Turbocharger	Yes (0.8L TCI)
Fuel system	Fuel injection
Fuel type	Gasoline LPG
Cooling system	Water-cooled
Output
Power output	48–70 PS (35–51 kW; 47–69 hp)
Torque output	6.6–10.5 kg⋅m (65–103 N⋅m; 48–76 lbf⋅ft)
Chronology
Successor	Kappa

Hyundai's Epsilon engine is a category of small inline gasoline automobile engines.

Variants

0.8 L (G3HA/G3HG)

The G3HA and G3HG engines are a 3-cylinder, 9 valves, SOHC, 0.8 L (814 cc) version with a 67 mm × 77 mm (2.64 in × 3.03 in) bore and stroke. Output is 56 PS (41 kW; 55 hp) at 5,500 rpm and 7.6 kg⋅m (75 N⋅m; 55 lbf⋅ft) at 4,000 rpm. This engine was used in Hyundai's small hatchback Hyundai Eon. As the name suggests, this engine is a G4HG engine with one fewer cylinders mainly designed for high fuel efficiency.

0.8 L (G4HA)

The G4HA is a 4-cylinder, 0.8 L (798 cc) version with a 63 mm × 64 mm (2.48 in × 2.52 in) bore and stroke. Output is 54 PS (40 kW; 53 hp) at 6,000 rpm and 7.4 kg⋅m (73 N⋅m; 54 lbf⋅ft) at 4,000 rpm.

0.8 L LPG (L4HA)

The L4HA is a 4-cylinder, 0.8 L (798 cc) LPG version with a 63 mm × 64 mm (2.48 in × 2.52 in) bore and stroke. Output is 48 PS (35 kW; 47 hp) at 6,000 rpm and 6.6 kg⋅m (65 N⋅m; 48 lbf⋅ft) at 4,000 rpm.

0.8 L TCI (G4HA)

The G4HA is a turbocharged 4-cylinder, 0.8 L (798 cc) version with a 63 mm × 64 mm (2.48 in × 2.52 in) bore and stroke. Output is 70 PS (51 kW; 69 hp) at 6,000 rpm and 10.5 kg⋅m (103 N⋅m; 76 lbf⋅ft) at 4,000 rpm.

1.0 L (G4HC/G4HE)

The G4HC/G4HE is a 4-cylinder 3 valves per cylinder engine that displaces 1.0 L (999 cc) with a larger 66 mm × 73 mm (2.60 in × 2.87 in) bore and stroke.

The G4HC power is 54–58 PS (40–43 kW; 53–57 hp) at 5,700 rpm and 7.4–8.6 kg⋅m (73–84 N⋅m; 54–62 lbf⋅ft) at 3,000 rpm. This engine has been used in Hyundai's Hatchback Atos/Santro.

The G4HE power is 61–72 PS (45–53 kW; 60–71 hp) at 5,600–6,000 rpm and 8.8–9.2 kg⋅m (86–90 N⋅m; 64–67 lbf⋅ft) at 4,500 rpm. This engine has been used in the Kia Picanto.

1.0 L LPG (L4HE)

The L4HE is a 4-cylinder, 1.0 L (999 cc) LPG version with a 66 mm × 73 mm (2.60 in × 2.87 in) bore and stroke. Output is 67–72 PS (49–53 kW; 66–71 hp) at 5,600–6,000 rpm and 9–9.2 kg⋅m (88–90 N⋅m; 65–67 lbf⋅ft) at 3,000–4,500 rpm.

1.1 L (G4HD/G4HG)

1.1 Epsilon G4HG engine on Hyundai Atos/Santro.

The G4HD/G4HG is a 4-cylinder 3 valves per cylinder engine that displaces 1.1 L (1,086 cc) with a larger 67 mm × 77 mm (2.64 in × 3.03 in) bore and stroke. This engine has been used in Hyundai's i10 (PA), Atos, Santro Xing cars and Kia Picanto. Firing order of this engine is 1-3-4-2 and idle rpm is 750± 100.

The G4HD power is 60–64 PS (44–47 kW; 59–63 hp) at 5,500 rpm and 8.9–9.6 kg⋅m (87–94 N⋅m; 64–69 lbf⋅ft) at 2,800 rpm.

The G4HG power is 64–70 PS (47–51 kW; 63–69 hp) at 5,500 rpm and 9.9–10.1 kg⋅m (97–99 N⋅m; 72–73 lbf⋅ft) at 2,800–4,500 rpm.

The CNG version of the engine is rated 60 PS (44 kW; 59 hp) at 5,500 rpm and 8.7 kg⋅m (85 N⋅m; 63 lbf⋅ft) at 4,500 rpm.

See also

• List of Hyundai engines