GM Medium Gasoline Engine
| Company type | Engine |
|---|---|
| Industry | Automotive |
| Founded | 2012 |
| Headquarters | Szentgotthárd , Hungary |
| Products | 4-cylinder petrol engines (SIDI Ecotec) |
| Parent | Opel Automobile GmbH |
Medium Gasoline Engine (MGE) represents a mid-sized 4-cylinder petrol engine engineered by Opel Automobile GmbH and sold under the SIDI Ecotec brand.
History
Manufacturing commenced in late 2012 at the Szentgotthárd facility in Hungary. Incorporating Start/Stop functionality, this engine achieves a 13% reduction in fuel usage and CO2 emissions relative to its forerunner, while complying with Euro 6 emission regulations.
The turbocharged Eco variant produces @ 4250 rpm with torque reaching (overboost ), first unveiled at the 2012 Moscow International Automobile Salon. A Performance model delivers maximum power and torque, utilizing specialized turbine aerodynamics and enhanced boost control to improve torque at lower engine speeds.
The high-performance turbocharged 20A4E engine, featuring central direct injection, has a bore and stroke of , cylinder pressure of , and compression ratios set at 9.5:1 for the Performance and 10.5:1 for the Eco versions. Developed by SAIC Motor in China, its construction includes a grey cast-iron block combined with an aluminum bedplate, an aluminum cylinder head, a chain-driven DOHC valvetrain equipped with hydraulic tensioners, dual continuous variable cam phasing, and a forged steel crankshaft. To enhance NVH characteristics, twin balance shafts and a custom cam cover are incorporated. Noise levels are further reduced by 2 dB through optimized compressor geometry and acoustic resonators. The central location of the injector allows for efficient stratified and homogeneous combustion. Frictional losses are minimized via refined main bearing journals, roller cam followers, and PVD-coated piston rings.
Starting in 2013, the MGE series replaced turbocharged 1.6 L Family I Ecotec engines in Opel's lineup, followed by substitution of naturally aspirated 1.6 L and 1.8 L Family 1 engines in Chevrolet vehicles during 2014–2015. By the 2020 model year, this engine was withdrawn from the U.S. market due to discontinuation of the Buick Cascada and Chevrolet Malibu Hybrid models amid weak sales and elevated European import tariffs.
Models
| Name | Displacement | Bore x Stroke | Compression Ratio | Power | Torque |
|---|---|---|---|---|---|
| A16XHT (LVP) | 1,598 cc (97.5 cu in) | 79 mm × 81.5 mm (3.11 in × 3.21 in) | 9.5:1 | 170 PS (130 kW) at 4750-6000 rpm |
|
| A16SHT/B16SHT (LWC) | 200 PS (150 kW) at 5500 rpm |
| |||
| (LKN) | 1,796 cc (109.6 cu in) | 80.5 mm × 88.2 mm (3.17 in × 3.47 in) | 11.5:1 | 122 PS (90 kW) at 5000 rpm | 175 N⋅m (129 lb⋅ft) at 4750 rpm |
| SAIC 20L4E 2.0 TGI (NetBlue) |
1,995 cc (121.7 cu in) | 88 mm × 82 mm (3.5 in × 3.2 in) | 10.0:1 | 231 PS (170 kW) at 5300 rpm 218 PS (160 kW) (Euro 6) 224 PS (165 kW) (Euro 5) |
350–360 N⋅m (260–270 lb⋅ft) across various rpm ranges |
Applications
The Eco A16XHT variant is utilized in:
- 2013 Opel Insignia
- 2013 Opel Astra
- 2013 Opel Cascada
- 2013 Opel Zafira Tourer
The Pro A16SHT engine powers:
- 2014 Opel Astra
- 2014 Opel Cascada
- 2014 Opel Zafira Tourer
- 2016 Buick Cascada (LWC designation)
- 2016 Opel Astra K
The Euro 6-compliant B16SHT Pro version is found in:
- 2018–present Opel Astra K
- 2018–present Opel Insignia B
The LKN engine is applied in hybrid models such as:
- 2016–2019 Chevrolet Malibu Hybrid
- 2016–2018 Buick LaCrosse 30H
- 2016–2019 Buick Regal 30H
The SAIC-produced 20L4E 2.0 TGI (NetBlue), rated at 224 PS, powers several SAIC Motor vehicles:
- 2014–present Maxus G10 (marketed as LDV G10 in Australia)
- 2015–2019 MG GS
- 2016–present Roewe RX5
- 2017–present Maxus T60 (LDV T60 Australia)
- 2018–present Maxus D90 (LDV D90 Australia)
- 2018–present Roewe RX8
- 2018–present MG HS
- 2019–present Maxus G20
- 2019–present Maxus T70
The more powerful SAIC 20A4E (NetBlue) with an output of 234 PS is featured in:
- 2020–present Roewe iMAX8
- 2022–present Roewe RX9
- 2023–present MG7