The Chrysler 6.1L HEMI is a 6,059 cc, 90‑degree V8 petrol engine produced between 2005 and 2010. It features a cast iron block, aluminium heads, single overhead camshafts (SOHC), and a hemispherical combustion chamber design. This configuration delivers robust, linear power, with outputs rated at 336 kW (425 PS) and 569 Nm of torque.
Fitted exclusively to high — performance SRT models like the Charger SRT8, Challenger SRT8, and Jeep Grand Cherokee SRT8, the 6.1L HEMI was e…
Production years 2005–2010 meet Euro 4 standards for applicable markets .
The Chrysler 6.1L HEMI is a 6,059 cc 90-degree V8 petrol engine engineered for high-performance sedans, coupes, and SUVs (2005-2010). It combines SOHC with hemispherical combustion chambers to deliver raw, high-revving power and a signature V8 exhaust note. Designed to meet Euro 4 standards, it prioritizes performance while maintaining relative drivability for its class.
| Parameter | Value | Source |
|---|---|---|
Displacement | 6,059 cc | |
Fuel type | Petrol | |
Configuration | 90° V8, SOHC, 16-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 103.0 mm × 90.9 mm | |
Power output | 336 kW (425 PS) @ 6,200 rpm | |
Torque | 569 Nm @ 4,800 rpm | |
Fuel system | Sequential multi-port fuel injection (SFI) | |
Emissions standard | Euro 4 | |
Compression ratio | 10.3:1 | |
Cooling system | Water-cooled | |
Turbocharger | None | |
Timing system | Chain-driven (single primary chain) | |
Oil type | Chrysler MS-6395 (SAE 5W-20) | |
Dry weight | 255 kg |
The Chrysler 6.1L HEMI was used exclusively in Chrysler Group's high-performance SRT models with longitudinal mounting. This engine received minor platform-specific calibrations for the Challenger versus the Grand Cherokee, but remained mechanically identical. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The 6.1L HEMI is renowned for its robust cast iron block and strong internals. Its main long-term concerns are valvetrain wear (lifters, cam) linked to oil quality and exhaust manifold bolt failures. With strict adherence to maintenance schedules using the specified 5W-20 oil and addressing exhaust bolts proactively, the engine can easily surpass 200,000 km. Aggressive driving without proper maintenance is the primary cause of major issues.
The most frequent issues are exhaust manifold bolts breaking causing a ticking noise, valve lifter or camshaft wear due to poor lubrication, PCV valve/oil separator failure leading to oil in the intake, and water pump failure causing leaks. These are well-documented in Chrysler service bulletins and enthusiast repair databases.
The 6.1L HEMI was used exclusively in SRT8 performance models: Chrysler 300C SRT8 (2006-2010), Dodge Charger SRT8 (2006-2010), Dodge Challenger SRT8 (2008-2010), and Jeep Grand Cherokee SRT8 (2006-2010). It was never offered in standard trim levels.
Yes, the 6.1L HEMI responds extremely well to modifications. Basic bolt-ons (intake, exhaust, tune) can yield significant gains. More power is easily achieved with forced induction (supercharger), which is very popular. The stock bottom end is incredibly strong and can handle 500-600+ kW with proper tuning and fuel system upgrades.
Fuel economy is characteristic of a large, naturally aspirated V8. Expect around 18-22 L/100km (13-16 mpg UK) in city driving and 12-14 L/100km (20-23 mpg UK) on the highway. Combined figures usually land around 15-17 L/100km (16-18 mpg UK), heavily dependent on driving style. It's not an engine for fuel economy.
Yes. The Chrysler 6.1L HEMI is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing catastrophic internal engine damage. This underscores the importance of using correct oil and addressing any unusual valvetrain noises promptly.
Chrysler mandates the use of 5W-20 engine oil meeting their MS-6395 specification. This specific viscosity is crucial for proper lubrication of the valvetrain, especially under high-RPM conditions. Using a heavier oil can contribute to lifter or cam wear. Change intervals should not exceed 10,000 km.
Comprehensive technical documentation and regulatory references
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UK vehicle approval processes, import rules, and MoT guidance.
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Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
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