2014 5.7L HEMI Horsepower Specs: Full Performance Breakdown Across All Models

In 2014, Chrysler's 5.7-liter V8 HEMI engine produced between 360 horsepower and 395 horsepower, depending on the specific vehicle model and intake configuration. The Ram 1500 truck claimed the top output at 395 hp and 410 lb-ft of torque, while passenger cars like the Dodge Challenger and Charger rated between 370 hp and 375 hp, and full-size SUVs delivered 360 hp.

2014 5.7L Eagle HEMI Engine Overview

The 2014 5.7-liter HEMI V8 belongs to the revised "Eagle" family of engines, which Chrysler introduced in 2009 to modernize the classic 345-cubic-inch displacement platform. This revision brought significant performance enhancements over early 2003–2008 HEMI engines, incorporating variable valve timing (VVT), optimized cylinder head ports, higher compression, and an updated active intake manifold on select vehicle applications.

Built around a deep-skirt cast-iron engine block with lightweight aluminum alloy cylinder heads, the 2014 5.7 HEMI relies on a traditional pushrod, two-valve-per-cylinder layout. However, Chrysler combined this simple overhead valve (OHV) architecture with advanced combustion engineering, including dual spark plugs per cylinder (16 spark plugs total) to ensure fast, complete fuel burn and minimize knock risk under high loads.

Core Technical Specifications

• Displacement: 5.7 Liters / 345 cubic inches (5,654 cc)
• Engine Configuration: 90-degree V8
• Bore x Stroke: 3.92 inches x 3.58 inches (99.5 mm x 90.9 mm)
• Valvetrain: Pushrod OHV, 16 valves (2 per cylinder), hydraulic roller lifters
• Compression Ratio: 10.5:1
• Fuel System: Sequential Multi-Port Electronic Fuel Injection (SEFI)
• Fuel Requirement: 89 Octane Mid-Grade recommended; 87 Octane acceptable
• Block / Head Material: Cast Iron / Cast Aluminum Alloy

2014 5.7 HEMI Horsepower & Torque Specs by Model

While every 2014 vehicle equipped with the 5.7 HEMI shares the same core engine block, displacement, and internal rotating assembly, exact horsepower and torque figures vary substantially between vehicle models. These discrepancies stem from differences in intake manifold design, exhaust routing constraints, engine control unit (ECU) calibration, accessory loads, and transmission pairings.

1. 2014 Ram 1500 (395 HP / 410 LB-FT)

The Ram 1500 holds the top performance rating for the 2014 5.7L HEMI lineup, generating 395 horsepower at 5,600 RPM and 410 lb-ft of torque at 3,950 RPM. Ram engineers achieved this maximum horsepower output by utilizing a truck-specific active runner intake manifold. The taller engine bay clearance in the truck chassis allowed for longer, freer-flowing intake runners and a larger air box, optimizing both low-end torque for towing and high-RPM airflow for peak horsepower. In 2014, the Ram 1500 offered two transmissions: the older 6-speed 65RFE automatic and the highly efficient ZF-sourced TorqueFlite 8-speed automatic (8HP70).

2. 2014 Dodge Challenger R/T (372 HP - 375 HP)

The 2014 Dodge Challenger R/T featured two separate power outputs based strictly on transmission selection:

• 6-Speed Manual (Tremec TR-6060): 375 horsepower at 5,150 RPM and 410 lb-ft of torque at 4,300 RPM. Manual models omit the Multi-Displacement System (MDS) cylinder deactivation, allowing for a slightly more aggressive factory engine calibration and higher rev headroom.
• 5-Speed Automatic (NAG1 / W5A580): 372 horsepower at 5,200 RPM and 400 lb-ft of torque at 4,400 RPM. Automatic models feature MDS cylinder deactivation to improve highway fuel economy.

3. 2014 Dodge Charger R/T (370 HP / 395 LB-FT)

The 2014 Dodge Charger R/T sedan outputs 370 horsepower at 5,250 RPM and 395 lb-ft of torque at 4,200 RPM. Paired exclusively with the 5-speed NAG1 automatic transmission for the 2014 model year, the Charger R/T's output is slightly lower than the Ram 1500 due to a lower-profile intake manifold necessary to clear the sleek passenger car hoodline, as well as tighter exhaust manifold routing around the front suspension frame rails.

4. 2014 Chrysler 300 (363 HP / 394 LB-FT)

In the full-size luxury Chrysler 300 (available on the 300S and 300C trims), the 5.7 HEMI delivers 363 horsepower at 5,200 RPM and 394 lb-ft of torque at 4,200 RPM. The minor output reduction compared to the Dodge Charger is primarily due to a quieter, more restrictive exhaust system design engineered to eliminate cabin drone and deliver a plush, luxury-oriented acoustic profile.

5. 2014 Dodge Durango & Jeep Grand Cherokee (360 HP / 390 LB-FT)

For 2014, both the Dodge Durango and Jeep Grand Cherokee shared the 5.7L HEMI V8 tuned for heavy SUV applications, producing 360 horsepower at 5,150 RPM and 390 lb-ft of torque at 4,250 RPM. For the 2014 model year, Chrysler paired this engine with the TorqueFlite 8-speed 8HP70 automatic transmission in both SUVs, vastly improving gear step-down acceleration and fuel economy over previous years' 5-speed automatics while retaining a 7,200–7,400 lb maximum towing capacity.

Why Horsepower Varies Between Vehicles

It is common for enthusiasts to ask why the exact same 5.7-liter V8 produces 395 horsepower in a Ram pickup truck but only 360 horsepower in a Jeep Grand Cherokee. The underlying internal engine hardware—including crankshaft, connecting rods, pistons, camshaft profile, and cylinder heads—is functionally identical across all 2014 5.7L Eagle implementations. The 35-horsepower variance comes down to three structural and operational design constraints:

Intake Manifold Volume and Geometry

Trucks like the Ram 1500 feature high-clearance engine bays that allow engineers to fit a tall, active dual-runner intake manifold. Variable-length intake runners allow the engine to switch between long runners (for maximizing low-RPM intake air velocity and torque) and short runners (for maximizing high-RPM airflow mass). Sedan and SUV chassis feature lower hood lines, forcing engineers to utilize flat, low-profile intake manifolds that restrict peak high-RPM volumetric efficiency.

Exhaust Manifold Routing and Restrictiveness

Under-hood space dictates exhaust manifold geometry. Passenger cars and unibody SUVs feature tight wheel wells, steering shafts, and crossmembers that force exhaust cast manifolds into sharp, compact bends. Ram trucks have wider frame rails, allowing cast manifolds with larger primary runners and smoother merge collectors, reducing exhaust backpressure and freeing up engine horsepower.

Transmission and Calibration Strategy

Vehicle weight, primary duty cycle, and acoustic requirements influence how Chrysler tuned the Powertrain Control Module (PCM). A Ram 1500 or Challenger R/T is calibrated for crisp throttle response and maximum power delivery, whereas a Chrysler 300 or Jeep Grand Cherokee utilizes smoother torque-management software curves to protect driveline components during heavy towing or provide smooth luxury shifts.

Key Core Technologies in the 2014 5.7 HEMI

The strong performance figures of the 2014 5.7 HEMI are made possible by three engineering features introduced or refined during the Eagle platform upgrade.

Variable Valve Timing (VVT)

Unlike older pushrod engines with fixed camshaft timing, the 2014 5.7 HEMI utilizes a hydraulic cam-phasing system controlled by the engine computer. The system can advance or retard the camshaft position by up to 37 crankshaft degrees. By retarding valve timing at high RPM, the engine pulls in more air to peak out horsepower; advancing timing at low RPM increases cylinder pressure to maximize low-end pull torque.

Multi-Displacement System (MDS)

MDS is Chrysler’s cylinder deactivation technology. Under light throttle conditions (such as steady highway cruising), special oil-control solenoids alter hydraulic pressure to collapse the lifters on cylinders 1, 4, 6, and 7. This disables the valves on those cylinders while the PCM cuts fuel injection to them. The engine seamlessly transforms into an efficient V4, saving up to 20% in fuel usage without sacrificing peak horsepower when the driver presses the accelerator. (Note: Manual transmission Challengers do not include MDS technology).

Dual Spark Plug Ignition System

To run a 10.5:1 compression ratio safely on pump fuel, Chrysler equipped each cylinder with two spark plugs firing sequentially or simultaneously depending on load. Twin spark plugs shorten the flame travel distance inside the hemispherical combustion chamber, providing a faster burn, cleaner exhaust emissions, and preventing pre-ignition (knock) without requiring ultra-high-octane fuel.

Real-World Performance: Wheel Horsepower vs. Crank Horsepower

The factory ratings published by Chrysler (360 to 395 HP) represent Brake Horsepower (BHP) measured directly at the engine flywheel on an engine dynamometer without vehicle driveline resistance.

When measuring horsepower at the rear wheels on a chassis dynamometer (Wheel Horsepower / WHP), friction, rotational inertia, and parasitic drag from the transmission, driveshaft, differential, axles, and heavy wheels reduce the power figure reaching the pavement.

• CRANK HORSEPOWER (395 HP)
  • Drag: Transmission (ZF 8-Speed or 65RFE)
  • Drag: Driveshaft & Differential
  • Drag: Axles, Wheels & Tires
• WHEEL HORSEPOWER (~320-335 WHP)

Typical Dyno Expectations by Model

• 2014 Ram 1500 (395 Crank HP): Expect approximately 320 to 335 WHP and 335 to 350 lb-ft of wheel torque on a RWD model (approx. 15–18% drivetrain loss). 4WD models show slightly higher loss (up to 20-22%) due to transfer case drag.
• 2014 Dodge Challenger / Charger (370–375 Crank HP): Expect approximately 305 to 325 WHP depending on whether it has the 5-speed automatic or 6-speed manual transmission.
• 2014 Durango / Grand Cherokee AWD (360 Crank HP): Expect approximately 280 to 295 WHP due to the continuous parasitic draw of full-time all-wheel-drive systems.

Fuel Octane Impact on Power

While the 2014 5.7 HEMI can safely operate on 87-octane regular unleaded gasoline, the engine's ECU will pull ignition timing if sensors detect minor knock under high load. Chrysler specifically recommends 89 Octane Mid-Grade gasoline to achieve the advertised horsepower and torque specifications. Premium 93-octane fuel will not provide additional power gains on a factory stock engine tune, but it offers a extra knock resistance margin in extremely hot ambient weather or heavy towing conditions.

Common Mechanical Issues Affecting Horsepower

As 2014 5.7 HEMI vehicles age, specific mechanical vulnerabilities can degrade engine performance, cause misfires, and reduce actual horsepower output. Owners and prospective buyers should monitor three primary areas:

1. Camshaft Lobe and Roller Lifter Failure ("HEMI Tick")

The most notorious reliability issue facing 2014 and similar-era 5.7 HEMI engines is premature wear of the hydraulic roller lifters. The needle bearings inside the roller tip of the lifter can seize or flatten out, causing the roller to stop spinning and scrape directly against the camshaft lobe.

• Effect on Power: As the camshaft lobe grinds down, intake and exhaust valve lift is dramatically reduced on that cylinder. This results in severe horsepower loss, rough idling, top-end hesitation, and engine misfire fault codes (P0300 through P0308).
• Prevention: Frequent oil changes (every 5,000 miles) using high-quality synthetic oil and limiting prolonged periods of engine idling, which starves the top-end valvetrain of splash lubrication.

2. Sheared Exhaust Manifold Bolts

The cast-iron exhaust manifolds on the 5.7 HEMI expand and contract at a different thermal rate than the aluminum cylinder heads. Over time, this thermal cycling puts extreme shear stress on the rear exhaust manifold studs (typically on cylinders 7 and 8), causing the bolt heads to snap off.

• Effect on Power: Broken manifold bolts cause an exhaust leak near the cylinder head, creating a distinct ticking sound when the engine is cold. The leaking exhaust allows ambient air to pull into the exhaust stream, corrupting Oxygen (O2) sensor readings. The ECU incorrectly interprets this as a lean condition and dumps excess fuel into the engine, causing rich running conditions, degraded throttle response, and lost horsepower.

3. MDS Solenoid and Lifter Sticky Engagement

The hydraulic operation of MDS lifters relies strictly on precise oil pressure and viscosity. Utilizing heavy motor oil (such as 10W-30 or 10W-40) instead of the factory-mandated 5W-20 engine oil can prevent the MDS solenoids from switching oil passages correctly.

• Effect on Power: If an MDS lifter fails to re-engage when switching back to 8-cylinder mode, the engine will run on 7 cylinders under load, resulting in severe hesitation, violent vibrations, and a major loss of acceleration power.

Upgrades and Tuning Potential for the 2014 5.7 HEMI

The 2014 5.7 Eagle HEMI responds extremely well to aftermarket modifications. Because 2014 model-year PCMs are directly tuneable via the OBD-II port (unlike 2015+ models, which require physically unlocking or swapping the engine controller), performance tuning is straightforward.

Basic Bolt-On Upgrades (Gains: +20 to +40 HP)

• Cold Air Intake (CAI): While the factory Ram 1500 intake is efficient, passenger cars benefit from a high-flow cold air intake, yielding 5–10 HP.
• Long-Tube Headers: Replacing restrictive factory cast exhaust manifolds with 1-3/4 inch long-tube headers and high-flow mid-pipes yields significant exhaust scavenge gains, adding 20–30 HP and 25 LB-FT of torque when paired with custom tuning.
• Cat-Back Exhaust: Offers nominal horsepower gains (5–8 HP) but provides an aggressive V8 acoustic exhaust tone.

Camshaft Upgrades & MDS Delete (Gains: +45 to +75 HP)

Replacing the factory VVT camshaft with an aftermarket performance camshaft is one of the most effective ways to extract power from a naturally aspirated 5.7 HEMI.

• Installing a mild-to-moderate performance cam (such as a Texas Speed or Comp Cams VVT profile) along with upgraded valve springs can bump total engine power to 440–470 Crank Horsepower.
• MDS Delete Kit: Most engine builders perform an "MDS Delete" during a cam swap by replacing the collapsible MDS lifters with solid non-MDS Hellcat/Non-MDS lifters and plugging the oil gallery holes in the block. This permanently removes cylinder-deactivation failure points while allowing the engine to rev safely up to 6,500+ RPM.

Forced Induction Limits (Gains: +120 to +200+ HP)

Installing a centrifugal (ProCharger) or positive displacement (Whipple/Edelbrock) supercharger onto a stock 2014 5.7 HEMI yields explosive power gains, easily pushing output past 500 to 550 Wheel Horsepower.

• Safe Pressure Threshold: The factory 5.7 HEMI utilizes cast hypereutectic pistons with thin top ring lands. On stock engine internals, safe manifold boost pressure is generally limited to 6 to 8 PSI on 93-octane pump gas or E85. Exceeding 8 PSI without upgrading to forged pistons and connecting rods risks piston ring land failure due to detonation or cylinder pressure limits.

Maintenance Recommendations for Optimal Horsepower

To ensure a 2014 5.7L HEMI maintains its factory horsepower and performance throughout its lifespan, adhere to the following maintenance schedules and operational guidelines:

1. Oil Changes (Crucial): Change engine oil every 5,000 miles or 6 months. Always use API-certified 5W-20 synthetic motor oil (such as Pennzoil Ultra Platinum) that meets Chrysler MS-6395 specifications. Never use heavier viscosity oil in an MDS-equipped engine.
2. Spark Plug Replacement: The 2014 5.7L HEMI uses 16 spark plugs. Factory 100,000-mile service intervals utilize Iridium plugs. Check electrode gaps (.043 in / 1.1 mm) during replacement. Worn plugs cause micro-misfires under heavy acceleration, degrading horsepower long before a check engine light illuminates.
3. Cooling System Health: The 5.7 HEMI aluminum cylinder heads are sensitive to overheating, which can drop valve seats in rare severe cases. Drain and flush coolant every 100,000 miles using OAT (Organic Additive Technology) 10-year/150,000-mile coolant fluid.
4. Throttle Body Cleaning: Clean carbon buildup from the electronic throttle body assembly every 30,000 to 40,000 miles to preserve sharp pedal response and idle stability.

Frequently Asked Questions

What is the exact horsepower of a 2014 5.7 HEMI Ram 1500?

The 2014 Ram 1500 equipped with the 5.7L V8 HEMI engine generates 395 horsepower at 5,600 RPM and 410 lb-ft of torque at 3,950 RPM from the factory.

Why does a 2014 Ram 1500 have more horsepower than a 2014 Charger 5.7 HEMI?

The Ram 1500 features a taller engine bay that accommodates a high-volume active runner intake manifold and freer-flowing exhaust manifold geometry. The Charger uses a lower-profile intake manifold and tighter exhaust manifold bends to fit under its sleek sedan hood line, resulting in 370 HP.

How many spark plugs does a 2014 5.7 HEMI engine take?

The 2014 5.7 HEMI takes 16 spark plugs (2 spark plugs per cylinder). The dual-plug setup ensures complete flame propagation across the large combustion chamber, preventing knock and maximizing combustion efficiency.

Does the 2014 5.7 HEMI require premium gas to make full horsepower?

No. The 2014 5.7 HEMI reaches its full advertised factory horsepower rating on 89 Octane Mid-Grade fuel. While it can safely run on 87 Octane regular fuel, the ECU may retard ignition timing slightly under load, resulting in a minor reduction in peak horsepower.

How much horsepower can a stock 2014 5.7 HEMI handle with a supercharger?

The stock cast-iron engine block and forged steel crankshaft can handle over 700 horsepower. However, the stock hypereutectic pistons and top ring lands are the main weak points. For long-term reliability on stock internal components, maximum boost should be kept at 6 to 8 PSI, yielding roughly 500 to 530 wheel horsepower.

Recommended Next Steps

If you are inspecting, buying, or upgrading a 2014 vehicle with the 5.7L V8 HEMI engine:

• Perform a Cold-Start Inspection: Listen closely near the wheel wells for metallic ticking sounds. An instant tick that disappears after 30 seconds usually points to broken exhaust manifold bolts. A persistent loud ticking sound from the top of the engine that rises with engine RPM indicates lifter failure.
• Verify Engine Oil History: Confirm that previous owners strictly utilized 5W-20 oil to prevent premature MDS solenoid or lifter failure.
• Plan Performance Mods Wisely: If seeking horsepower gains, start with a custom ECU calibration and long-tube headers before considering internal camshaft swaps or forced induction upgrades.