The 2005 Chrysler 300C equipped with the 5.7L Hemi Magnum V8 delivers 345 horsepower and 370 lb-ft of torque on SAE net ratings.
The 5.7L Hemi Magnum powered the 300C as a performance-focused option for that model year, combining classic V8 character with modern emissions and drivetrain refinements. In 2005, official figures followed SAE net standards, with peak power typically occurring in the low to mid RPM range and peak torque around the 4,000 RPM mark. This article lays out the standard numbers, how they’re measured, and notes any nuances you should know when comparing sources.
Official horsepower and torque figures
To present a clear snapshot, here are the engine’s core output figures for the 2005 300C with the 5.7L Hemi, using the rating method commonly cited by manufacturers and publications at the time.
Before listing, note that the following figures refer to the engine’s output under standard testing conditions and may differ slightly in real-world driving due to environmental and mechanical factors.
- Horsepower (SAE net): 345 hp
- Torque (SAE net): 370 lb-ft
- Peak horsepower rpm: approximately 5,200 rpm
- Peak torque rpm: approximately 4,000 rpm
- Engine designation: 5.7L Hemi Magnum V8
The 345 hp figure is the widely cited official rating for the 2005 300C with the 5.7L Hemi, paired with 370 lb-ft of torque. Some older or regional publications may list 340 hp due to different rating conventions or market-specific calibrations, but the commonly accepted U.S. specification for that year remains 345 hp and 370 lb-ft.
Context and variations
Understanding these numbers in context helps readers compare specs across model years and markets, and clarifies why figures can vary slightly between sources.
- Rating method: The 2005 Hemi uses SAE net ratings, which reflect modern test conditions and include accessory loads; older gross ratings yield higher numbers and can cause confusion when comparing to vintage data.
- Market and year variations: While the 300C 5.7L Hemi generally uses the same engine, emissions equipment and calibration can introduce small differences by region or production run.
- Power at the wheels: Engine horsepower translates to wheel horsepower after drivetrain losses, so actual numbers at the wheels will be lower depending on rear-drive configuration and transmission setup.
- Trim scope: The 5.7L Hemi was the performance option for the 300C; other trims did not have the Hemi, so the horsepower figure is specific to this variant.
In practice, enthusiasts and collectors typically reference 345 hp and 370 lb-ft as the canonical specification for the 2005 300C with the 5.7L Hemi, while acknowledging minor publication discrepancies may exist.
Summary
The 2005 Chrysler 300C with the 5.7L Hemi Magnum V8 outputs about 345 horsepower and 370 lb-ft of torque under SAE net ratings, with peak power around 5,200 rpm and peak torque near 4,000 rpm. Real-world wheel horsepower will be lower due to drivetrain losses, and some sources may report 340 hp depending on rating conventions or regional calibrations.
Notes for readers and buyers
For anyone verifying a specific vehicle, VIN-based documentation or dealership records can confirm the exact figure for a given car, as small variations may exist across production batches and markets.