Hyundai Beta engine

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Hyundai Motor Company logo.svg      Beta engine
Hyundai Beta Engine For Elantra XD.JPG
Manufacturer Hyundai Motor Company
Production 1995-present
Combustion chamber
Configuration inline engine
Displacement 1.6L (1599 cc)
1.8L (1795 cc)
2.0L (1975 cc)
Cylinder bore 77.4 mm (3.047 in) (1.6L)
82.0 mm (3.228 in) (1.8/2.0L)
Piston stroke 85.0 mm (3.346 in) (1.6/1.8L)
93.5 mm (3.681 in) (2.0L)
Cylinder block alloy Aluminum
Cylinder head alloy Aluminum
Valvetrain DOHC
Compression ratio 9.2 (1.6L & 1.8L)
Fuel type petrol gasoline
Power output 116 hp (85 kW) @ 6000 rpm (1.6L)
130 hp (96 kW) @ 6000 rpm (1.8L)
140 hp (102 kW) @ 6000 rpm (2.0L)
Torque output 106 lb·ft (143 Nm) @ 4900 rpm (1.6L)
126 (170 Nm) @ 4200 rpm (1.8L)
133 (180 Nm) @ 4800 rpm (2.0L)
Dry weight 136 kg (1.6L)
135,6 kg (1.8L)
144 kg (2.0L)
Successor Theta

The Hyundai Beta engine is a 1.6 L to 2.0 L straight-4 built in Ulsan, South Korea. All Beta engines are DOHC designs.


The G4GR (also called the 1.6 D) is a 1.6 L 1,599 cc (97.6 cu in) 4 cylinder DOHC engine. Output is 116 hp (85 kW) at 6000 rpm and 106 lb·ft (143 Nm) at 4900 rpm. The engine's bore is 77.4 mm (3.047 in) and its stroke is 85.0 mm (3.346 in). Its horsepower net is 66 kW / 90 PS / 89 hp (ECE) and a torque net of 126 Nm / 93 ft-lb


The G4GM (also called the 1.8 D) is a 1.8 L 1,795 cc (109.5 cu in) DOHC engine with a 82.0 mm (3.228 in) and the same 85.0 mm (3.346 in) stroke as in the smaller 1.6. Output is up to 130 hp (96 kW) at 6000 rpm and 126 of torque (170 Nm) at 4200 rpm. Its first appearance was in the 1996 Lantra.


The G4GF (also called the 2.0 D) is the 2.0L (1975cc) version, having debuted in 1997 as the uplevel engine for the original Hyundai Tiburon. It shares the 82 mm bore of the 1.8 but is stroked to 93.5 mm. It has a cast iron engine block and aluminum DOHC cylinder head. It uses MFI fuel injection, has four valves per cylinder and features powdered cast steel connecting rods. OPA Output is 140 hp (102 kW) at 6000 rpm and 133 pound force-feet (180 N·m)

Beta II[edit]

During 2001-2002, the new Beta II (G4GC) engine made its debut in models such as the XD Elantra and GK Tiburon. Output is 138 hp (102 kW) at 6000 rpm with 136 pound force-feet (184 N·m) of torque (184 N·m) at 4500 rpm[citation needed]. It has a cast iron engine block and aluminum DOHC cylinder heads. The latest version of the 2.0L Beta engine (G4GC) features CVVT, which exists only on the intake side, a first for Hyundai/Kia. The following changes were noted.

  • Redesigned block with external contouring of cylinder bores (instead of flat sides), extra ribbing and one extra transaxle fixing point (now 5)(less NVH)
  • Crankshaft now has 8 counterweights instead of 4.(NVH)
  • Cast & ribbed aluminium sump pan (instead of pressed steel sheet) with stronger joint to transaxle (NVH)
  • Reshaped combustion chambers, ports & pistons (performance, [fuel] economy, emissions)
  • 20 mm (0.8 in) longer intake rams, 8% smaller surge tank, resonator added, spark timing and valve lift optimized, lighter valve springs, denser conrod bearings, returnless fuel system (instead of return type) with higher fuel pressure and smaller injectors (torque spread and economy)
  • Cylinder head machined to more precise tolerances
  • Head gasket now 2-layer (instead of 3)
  • Idle speed reduced to 700 rpm from 800 rpm (NVH)
  • Hydraulic engine mounts (4) instead of rubber (NVH)
  • Heat shield installed between engine and air filter, reducing heating of induction air.
  • New camcover with I-piece high-specific gravity polypropylene baffle (ilo 2-piece pp)
  • Oil flow reduced (economy)
  • Mechanical valve lash adjusters (solid lifters) replace hydraulic, improving valve clearance precision (durability).
  • Lower valve spring load reduces valve train friction (performance).
  • Engine cover installed (NVH and dress up engine bay)
  • Catalytic converter now upstream adjoining exhaust manifold (ilo under car) (emissions)
  • Other detail changes to: alternator, intake manifold brace, power steering & a/c pulleys, idle speed actuator, oil filler cap & drive plate between engine & torque converter [1]

In 2008 the Beta II was modified to produce 142 horsepower (106 kW) and 137 lb·ft (186 N·m) of torque.


See also[edit]

External links[edit]