Hyundai

Hyundai Motor Company

Hyundai Motor Company is a Korean multinational automaker based in Seoul, South Korea which, along with Kia, comprises the Hyundai Kia Automotive Group, the world's fourth largest automaker as of 2009. As of 2011, it is the world's fastest growing automaker for two years running...

's Alpha automobile

Automobile

An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...

 engine was the first to be designed in Korea

Korea

Korea ) is an East Asian geographic region that is currently divided into two separate sovereign states — North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by the People's Republic of China to the northwest, Russia to the northeast, and is separated from Japan to the...

. It was a modern SOHC 3-valve

Multi-valve

In automotive engineering a multi-valve or multivalve engine is one where each cylinder has more than two valves. A multi-valve engine has better breathing and can operate at higher revolutions per minute than a two-valve engine, delivering more power.- Multi-valve rationale :A multi-valve design...

 straight-4

Straight-4

The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....

 and was available in turbo and naturally aspirated versions. The first Alpha engine was introduced in 1993 in the Hyundai Scoupe

Hyundai Scoupe

The Hyundai Scoupe is a 2-door coupé based on the Hyundai Excel. The name, a portmanteau of "sporty" and "coupe," was pronounced "scoop". In the UK and other countries it is known as an "S Coupé". It was sold in the United States from 1991 through 1995...

 and were available thru 2002. Alphas were produced in 1.3 L (1341 cc) and 1.5 L (1495 cc) versions, with a 1.6 L (1599 cc) Alpha II produced from 2005 until 2011 when it was replaced with the Hyundai Gamma engine

Hyundai Gamma engine

The Hyundai Gamma engine was introduced in the 2010 Hyundai Accent concept car to replace the existing Hyundai Alpha engine in the Hyundai Accent and Kia Rio. There are 1.4L and 1.6L versions of this engine.-1.6L:...

.

1.3

The G4EH is a 1.3 L engine, with a bore and stroke of 71.5 mm and 83.5 mm, respectively. Output was 71 hp (53 kW) at 5500 rpm and 81 ft·lbf (110 N·m) at 3000 rpm for the carbureted 1.3 CON version and 83 hp (62 kW) at 5500 rpm and 86 ft·lbf (117 N·m) at 3000 rpm for the SOHC 1.3 S.

1.5

The G4EK is a 1.5 L engine, with a bore and stroke of 75.5 mm and 83.5 mm, respectively. The SOHC 12 valves 1.5 S generated a respectable but not notable 92 hp (69 kW) at 5500 rpm and 97 ft·lbf (132 N·m) at 4000 rpm, although some websites quote the torque rating as being 97 ft·lbf (132 N·m) at 2700 rpm. European version makes 90 hp (66 kW) at 5500 rpm and 129 (or 132) Nm at 2900 (or 3000) RPM.

With the addition of a DOHC cylinder head

Cylinder head

In an internal combustion engine, the cylinder head sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket...

 on the G4FK, the power output raised to 101 hp (75 kW) at 5800 rpm and 98 ft·lbf (133 N·m) at 3000 rpm.

The turbocharged SOHC Alpha, also introduced in 1993, produced 115 hp (86 kW) at 5500 rpm and 123 ft·lbf (167 N·m) at 4500 rpm. This engine was equipped with a Garett T3 turbocharger.

1.6

The Alpha was updated in 2005 and debuted in the Accent

Hyundai Accent

The Hyundai Accent , or Hyundai Verna in South Korea, is a subcompact car produced by Hyundai. In Australia, the first generation models carried over the Hyundai Excel name used by the Accent's predecessor. The Accent was replaced in 2000 by the Hyundai Verna in South Korea, although most...

 economy car. The G4ED Alpha II was enlarged to 1.6L (1599 cc) thanks to a 76.5 mm bore and 87 mm stroke. A 10:1 compression ratio

Compression ratio

The 'compression ratio' of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity...

 produced 110 hp (82 kW) at 5800 rpm with 106 ft·lbf (144 N·m) of torque at 3000 rpm.

The Alpha II has a cast iron engine block and aluminum DOHC cylinder heads with 4 valves per cylinder

Multi-valve

In automotive engineering a multi-valve or multivalve engine is one where each cylinder has more than two valves. A multi-valve engine has better breathing and can operate at higher revolutions per minute than a two-valve engine, delivering more power.- Multi-valve rationale :A multi-valve design...

. It uses MFI fuel injection

Fuel injection

Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....

 and features forged steel connecting rods. It has COP (Coil-On-Plug) ignition, graphite-coated pistons and new cylinder block design to increase strength. Throttle body bore has increased from 48 to 52 mm. The power and torque spread of the engine is across a wider range of engine speeds due to Continuously Variable Valve Timing. Engine and automatic transmission control is now integrated into one module and the PCM is located in the engine compartment. It is ULEV-certified in all 50 U.S. states. The Alpha engine family is produced in Ulsan, South Korea.