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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11The official specifications available here identify high-output four-cylinder engines from Mercedes-AMG and Stellantis, but do not establish comparable current figures for GM or Toyota. Mercedes-AMG lists up to 476 PS for the M139l combustion engine in the GLC 63 S E PERFORMANCE; Stellantis lists 324 SAE hp for its Hurricane 4 Turbo, first announced for the 2026 Jeep Grand Cherokee. Those figures use different rating units and applications, so they are specifications—not a like-for-like test or a complete four-brand ranking.
What counts as a powerful four-cylinder engine?
This comparison uses peak output from the combustion engine itself. That distinction matters for hybrids: an engine’s rating must not be confused with the combined output of the engine and electric motor. Published manufacturer ratings also use different units here—PS for Mercedes-AMG and SAE-certified hp for Stellantis—so the figures are reported as published rather than converted into a definitive ranking.
The figures below are manufacturer specifications, not results from an independent test conducted with a shared method. Vehicle application and model year are included because output can depend on the specific installation.
Mercedes-AMG: M139 and M139l
M139 in the A 45 S and CLA 45 S
Mercedes-Benz Media reported 310 kW (421 PS) and 500 Nm for the 1,991 cc M139 in the Mercedes-AMG A 45 S and CLA 45 S. In its 2019 release, the manufacturer described it as the world’s most powerful series-production four-cylinder turbo engine at the time. That is a dated manufacturer claim; it does not establish a universal ranking for 2026. Mercedes-Benz Media’s 2019 A 45 and CLA 45 release.
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- 【REPLACEMENT】Kazuma viper 110/SSR 110/Kazuma Falcon 110/Panda 100/Coyote 110/Redcat 110/Roketa 110/BMS 110/Sunl 110/Coolster 110/ 4-Stroke 1P52FMH Horizontal Engine 110cc ATV Dirt Pit Bike Go Karts Quad 4 Wheeler Dune Buggys Motorcycle;【NOT FOR】125cc Cylinder Head with 23mm and 28mm Intake and Exhaust valves;
- 【SIZE】28 tooth sprocket;The Cylinder Diameter:52.4mm/2.1";Mounting hole distance:47mm/1.85“；45mm/1.77";Mounting hole diameter:8mm/0.31;intake hole diameter:45mm/1.77";Please pay attention to whether the size matches your needs when purchasing.
- 【CONTENT】1 x Complete Cylinder Head, 1 x Big Bore Complete Cylinder,1 x Piston Ring Kit,4 x Gaskets,1 x Spark Plug
- 【HIGH PERFORMANCE】Cylinder big bore kits with high toughness,Adoption of optimized cooling channel design effectively improves the heat dissipation efficiency and ensures that the engine maintains a stable operating temperature during high load operation, prolonging engine life.
- 【Service】We hold a deep commitment to delivering exceptional service quality. Your satisfaction is our top priority. Should you encounter any issues during or after your purchase, please reach out to us. We are committed to resolving them promptly and ensuring a positive experience for our customers.
M139l in the GLC 63 S E PERFORMANCE
For the GLC 63 S E PERFORMANCE, Mercedes-Benz Media gives the M139l combustion engine an output of 350 kW (476 PS) and 545 Nm. It separately lists 500 kW (680 PS) and 1,020 Nm for the vehicle’s hybrid system. The 680 PS figure belongs to the combined system, not the four-cylinder engine alone. Mercedes-Benz Media’s 2023 GLC release.
Stellantis: Hurricane 4 Turbo
On October 28, 2025, Stellantis announced the Hurricane 4 Turbo with SAE-certified ratings of 324 hp and 332 lb-ft. The company said its first application would be the 2026 Jeep Grand Cherokee. These are the announced engine ratings for that application; they should not be treated as an independent comparison with Mercedes-AMG’s PS figures. Stellantis Fleet and Small Business Solutions’ announcement.
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- This is a complete engine top end rebuild kit that is compatible with the 1988-2000 Honda TRX 300 2x4 & 4x4 FW and includes a new stock size cylinder, new standard size piston kit, new top end gasket kit, new oil filter with o-rings, new spark plug, and free decals.
Stellantis senior vice president and head of Global Propulsion Systems Micky Bly said the engine delivers “162 horsepower per liter of displacement,” attributing that figure to its variable geometry turbocharger, high-performance combustion and twin fuel system. This is a manufacturer statement, not an independent test result. Stellantis’ announcement.
GM and Toyota: figures not established here
No usable official specification in the available sources establishes a current GM or Toyota four-cylinder engine’s engine-only peak output and model-year vehicle application. Their positions therefore remain unresolved; assigning them a number would risk mixing model years, applications, rating standards or hybrid-system totals.
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- Fits the GY6 125cc to 150cc Engine with a 60mm Tall Head,76mm Bolt Pattern & 4 Bolt Valve Cover
- Intake Valve: Outside Diameter 28mm / Length 66mm
- Exhaust Valve: Outside Diameter 23mm / Length 65.5mm
- Combustion Chamber Diameter-57.4mm
- This a Non EGR Head, Does Not Have the EGR Port
What the available figures do—and do not—show
| Manufacturer and engine | Vehicle application | Engine output as published | Peak torque as published | Qualification |
|---|---|---|---|---|
| Mercedes-AMG M139 | A 45 S and CLA 45 S | 310 kW (421 PS) | 500 Nm | Mercedes-Benz Media manufacturer specification; 1,991 cc. The 2019 release’s “world’s most powerful” wording is a claim made at that time. |
| Mercedes-AMG M139l | GLC 63 S E PERFORMANCE | 350 kW (476 PS) | 545 Nm | Mercedes-Benz Media manufacturer specification for the combustion engine; the separate hybrid-system rating is 500 kW (680 PS) and 1,020 Nm. |
| Stellantis Hurricane 4 Turbo | First announced application: 2026 Jeep Grand Cherokee | 324 hp | 332 lb-ft | Stellantis announcement dated October 28, 2025; output is SAE-certified. |
| GM four-cylinder entry | Not established | Not established | Not established | No usable official engine-only specification and application established in the sources cited here. |
| Toyota four-cylinder entry | Not established | Not established | Not established | No usable official engine-only specification and application established in the sources cited here. |
Within the documented Mercedes-AMG examples, the M139l has the higher engine-only output. The available evidence cannot establish which brand leads across all four named manufacturers, and the different rating units do not support a strict cross-brand order without further comparable specifications.
Quick Recap
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- Compatible with 1988-2000 Honda TRX 300 2x4 & 4x4 FW four-wheelers (this is for the Utility Model ATVs with the rack on the front and the back, NOT the race model ATVs).
- Replaces Part Numbers: Cylinder Kit( 12100-HC4-000 ), Piston Ring Set(13011-HC4-306), Piston Kit(13101-HC4-000), Pin(13111-HC0-000), Gasket Kit (12191-HC4-900, 12251-HA0-004)
- Package include: Cylinder x1, Piston Kit x1, Piston Ring Set x1, Gasket Kit x1, Oil Filter x1, Spark Plug x2
- Compatible with Honda 1988-2000 Fourtrax TRX300FW
- Complete 281.7cc Cylinder Kit
Rank #4
- Precision Compatibility：Fitment for 4-stroke 110cc engines, including TaoTao, SSR, Coolster, Kazuma Falcon, Redcat, and more.
- Not fit for 125cc models using 23mm/28mm valves.
- High-Performance Design:Features a 52.4mm bore, 23mm intake valve, 20mm exhaust valve, and 28-tooth timing sprocket. Optimized cooling channels ensure efficient heat dissipation for stable engine operation.
- Durable Construction:Made of high-strength aluminum alloy with anti-corrosion and rustproof coating. Built to withstand harsh conditions and extend engine lifespan.
- Complete Kit for Easy Installation:Includes cylinder head, gaskets, spark plug (A7TC). Pre-assembled components simplify DIY replacement with no special tools required.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
