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θ engine Theta engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Hyundai Motor Company |
| Production | 2004–present |
| Layout | |
| Configuration | Inline-four |
| Displacement | 110 cu in (1,798 cc) 122 cu in (1,998 cc) 144 cu in (2,359 cc) |
| Cylinder bore | 86 mm (3.4 in) (2.0L, 1.8L) 88 mm (3.5 in) (2.4L) |
| Piston stroke | 77.4 mm (3.05 in) (1.8L) 86 mm (3.4 in) (2.0L) 97 mm (3.8 in) (2.4L) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC |
| Compression ratio | 10.5:1 (2.0 L) 10.3:1 (2.4 L MPi) 11.3:1 (2.4 L GDi) 9.5:1–10.0:1 (2.0 L T-GDi) |
| Combustion | |
| Fuel system | MPI GDI |
| Management | EMS-II from Siemens VDO |
| Fuel type | Unleaded gasoline |
| Oil system | Pressure feed |
| Cooling system | Watercooled |
| Output | |
| Power output | 133–280 PS (98–206 kW; 131–276 hp) |
| Torque output | 16.9–40 kg⋅m (166–392 N⋅m; 122–289 lbf⋅ft) |
| Dimensions | |
| Dry weight | 134 kg (295 lb) (2.0L) 146 kg (322 lb) (2.4L) |
| Chronology | |
| Predecessor | Beta |
| Successor | Smartstream G2.5/G2.5T |
The Hyundai Theta is a gasoline four-cylinder automobile engine family. The third all-aluminum engine of Hyundai Motor Company debuted in the fourth-generation Hyundai Sonata sedan (codenamed NF), which was unveiled in August 2004 in South Korea.[1] Hyundai Motor Manufacturing Alabama (HMMA) built a Theta II engine shop on the grounds of their Montgomery, Alabama automobile factory.