Jeep SRT 6.4 Specs: Unpacking the High-Performance Grand Cherokee

Jeep SRT 6.4 Specs: Unpacking the High-Performance Grand Cherokee jeeps.truckstrend.com

The automotive world is replete with vehicles designed for specific purposes: rugged off-roaders, sleek sports cars, practical family SUVs. Then, there are outliers – machines that defy easy categorization, blending seemingly disparate attributes into a compelling, often exhilarating package. The Jeep Grand Cherokee SRT with its formidable 6.4-liter HEMI V8 engine stands as a prime example of such a vehicle. It’s not just an SUV; it’s a high-performance muscle machine draped in utilitarian attire, designed to conquer both the open road and the occasional drag strip.

This comprehensive guide, "Jeep SRT 6.4 Specs," aims to meticulously dissect every aspect of this powerhouse SUV. From its roaring engine to its sophisticated suspension and driver-centric interior, we will explore the technical specifications, performance capabilities, and ownership considerations that define the Grand Cherokee SRT 6.4L, offering practical insights for enthusiasts and potential owners alike.

Jeep SRT 6.4 Specs: Unpacking the High-Performance Grand Cherokee

The Heart of the Beast: 6.4L HEMI V8 Engine

At the core of the Jeep Grand Cherokee SRT’s allure is its legendary engine: the 6.4-liter (392 cubic inch) naturally aspirated HEMI V8. This isn’t merely an engine; it’s a statement, a nod to American muscle car heritage, engineered for raw power and immediate throttle response.

Key Specifications:

• Displacement: 6.4 liters (6,417 cc / 392 cubic inches)
• Horsepower (Stock): Typically 470-475 hp (depending on model year) @ 6,000 rpm
• Torque (Stock): 465 lb-ft @ 4,300 rpm
• Compression Ratio: 10.9:1



• Engine Technologies:
  • Fuel Saver Technology (Multi-Displacement System – MDS): This clever system deactivates four cylinders under light load conditions (e.g., highway cruising) to improve fuel efficiency, seamlessly switching back to eight cylinders when power is needed.
  • Variable Valve Timing (VVT): Optimizes valve overlap for improved low-end torque and high-end power.



• Performance Metrics (Manufacturer Estimates):
  • 0-60 mph: Approximately 4.8 seconds
  • Quarter-Mile: Mid-13 second range
  • Top Speed: Approximately 160 mph (electronically limited)

  

The 6.4L HEMI delivers a visceral driving experience, characterized by a deep, guttural exhaust note and instant acceleration that belies the vehicle’s considerable size and weight. While not as outrageously powerful as its supercharged Trackhawk sibling, the naturally aspirated 6.4L offers a more linear and immediate power delivery that many purists appreciate.

Drivetrain and Transmission: Putting Power to the Pavement

Translating the HEMI’s immense power into usable forward motion requires a robust and intelligent drivetrain. The Grand Cherokee SRT is equipped with a sophisticated system designed for both performance and all-weather capability.

• Transmission: ZF 8HP70 8-Speed Automatic Transmission. This world-class automatic transmission is renowned for its smooth shifts, quick response, and ability to handle high torque. It features paddle shifters for manual control, allowing the driver to select gears precisely.
• Drivetrain: Quadra-Trac Active On-Demand 4×4 System. Unlike traditional off-road 4×4 systems, Quadra-Trac is performance-tuned. It features a single-speed transfer case that automatically distributes torque to the wheels with the most grip, optimizing traction for spirited driving on paved surfaces, wet roads, or even light snow.
• Rear Differential: Electronic Limited-Slip Differential (ELSD). This system actively manages torque distribution between the rear wheels, enhancing stability during cornering and improving traction during aggressive acceleration.
• Launch Control: A standard feature that allows for optimal, repeatable standing-start acceleration. By engaging launch control, the system automatically manages engine RPM and wheelspin for the quickest possible takeoff.

Practical Advice: For optimal performance, always use premium fuel (91+ octane) as specified by the manufacturer. Regularly checking and maintaining transmission fluid is crucial, especially for vehicles driven hard.

Chassis and Suspension: Taming the Power

A powerful engine is only half the equation; effectively managing that power requires a finely tuned chassis and suspension. The Grand Cherokee SRT is engineered to handle its prodigious output with composure and agility.

• Adaptive Damping Suspension (Bilstein): This sophisticated system continuously adjusts shock absorber firmness based on driving conditions, driver input, and selected drive mode (Auto, Sport, Track, Snow, Tow). In "Track" mode, the suspension stiffens significantly for minimal body roll and maximum grip.
• SRT-Tuned Suspension Geometry: Unique spring rates, anti-roll bars, and bushings are specifically designed to reduce body roll and enhance handling dynamics, distinguishing it from standard Grand Cherokee models.
• Steering: Electro-hydraulic power steering, tuned for a precise and communicative feel, with varying levels of assist depending on the drive mode.
• Brakes: High-performance Brembo braking system. This is a critical component for stopping such a heavy, powerful vehicle.
  • Front: Six-piston calipers gripping 15.0-inch (380 mm) vented rotors.
  • Rear: Four-piston calipers gripping 13.8-inch (350 mm) vented rotors.
  • The braking performance is exceptional for an SUV, offering strong, fade-resistant stopping power.

Important Consideration: While highly capable on paved roads, the SRT’s low ground clearance and stiff suspension make it unsuitable for serious off-roading. Its performance focus means it sacrifices the typical Jeep trail-crawling ability.

Exterior Design: Form Meets Function

The Jeep Grand Cherokee SRT 6.4L’s exterior design is a clear indicator of its performance intentions, blending the Grand Cherokee’s familiar silhouette with aggressive, functional styling cues.

• Aggressive Fascias: Unique front and rear fascias with larger air intakes for engine cooling and brake ventilation, along with integrated fog lights and a distinctive grille.
• Performance Hood: A sculpted hood featuring a prominent functional heat extractor (hood scoop) to help dissipate engine heat.
• Aerodynamics: Integrated front splitter, side skirts, and a rear spoiler enhance aerodynamic stability at high speeds.
• Wheels and Tires: Typically fitted with 20-inch lightweight forged aluminum wheels wrapped in high-performance all-season or summer tires (e.g., Pirelli Scorpion Verde or P-Zero). Tire sizes are usually 295/45ZR20.
• Exhaust: Dual bright exhaust tips integrated into the rear fascia, producing a deep, resonant exhaust note that perfectly complements the HEMI engine.

The SRT’s design is not merely aesthetic; every element serves a purpose in managing airflow, cooling, and stability, contributing to its overall performance.

Interior and Technology: Performance and Comfort

Step inside the Grand Cherokee SRT 6.4L, and you’re greeted by an interior that balances high-performance cues with premium comfort and cutting-edge technology.

• Sport Seats: Heavily bolstered Nappa leather and suede (Alcantara) sport seats provide excellent support during spirited driving, often featuring SRT logos and contrast stitching.
• SRT-Specific Steering Wheel: A flat-bottom, leather-wrapped steering wheel with integrated paddle shifters and SRT badging.
• Uconnect Infotainment System: A large touchscreen display (8.4 inches) provides access to navigation, audio, climate control, and connectivity features. It’s user-friendly and responsive.
• SRT Performance Pages: A standout feature, accessible through the Uconnect system, allowing drivers to view real-time performance data such as 0-60 mph times, g-forces, horsepower, torque, and lap times. It also allows customization of drive modes.
• Premium Audio: Often equipped with a Harman Kardon or Alpine premium audio system for an immersive sound experience.
• Safety Features: Includes a suite of advanced safety features such as adaptive cruise control, blind-spot monitoring, forward collision warning, and parking assist systems.

The cabin environment is designed to be both driver-focused and luxurious, making long journeys comfortable while always reminding occupants of the vehicle’s performance pedigree.

Driving Dynamics and Experience

Driving the Jeep Grand Cherokee SRT 6.4L is a unique experience. It’s a vehicle that defies its SUV classification with surprising agility and exhilarating acceleration.

• On-Road Performance: Despite its weight, the SRT handles with impressive composure. The adaptive suspension keeps body roll in check, and the precise steering allows for confident cornering. The power delivery is immediate and thrilling, making overtakes effortless.
• Track Capability: While not a dedicated track car, the SRT can hold its own on a road course for an SUV. The Brembo brakes provide excellent stopping power, and the selectable drive modes allow for optimal setup for track use. Launch control provides consistent drag strip performance.
• Daily Drivability: In "Auto" mode, the SRT transforms into a comfortable and relatively docile daily driver. The MDS system helps mitigate fuel consumption (though it remains a thirsty vehicle), and the comfortable interior makes commutes enjoyable. The ride quality is firm but not harsh.
• Fuel Economy (A Challenge): This is arguably the biggest compromise. Expect EPA estimates around 13-14 MPG city and 19-20 MPG highway, with real-world figures often lower, especially with a heavy foot.

Tips for Driving: Experiment with the different drive modes. "Auto" is great for daily use, "Sport" sharpens throttle response and transmission shifts, and "Track" provides the most aggressive settings for maximum performance. Use Launch Control only on safe, closed courses.

Maintenance and Ownership Considerations

Owning a high-performance vehicle like the Grand Cherokee SRT 6.4L comes with specific considerations.

• Regular Maintenance: Adhere strictly to the manufacturer’s recommended maintenance schedule. Given the performance components, timely oil changes, fluid checks, and filter replacements are crucial.
• Tire Costs: The large, high-performance tires are expensive to replace and have a shorter lifespan than standard SUV tires, especially if driven aggressively.
• Brake Components: Brembo pads and rotors are high-performance items, and their replacement can be costly.
• Fuel Requirements: Always use premium octane fuel. Using lower octane can lead to reduced performance and potential engine damage over time.
• Insurance: Due to its performance nature and higher value, insurance premiums can be higher than for a standard SUV.
• Potential Challenges: While generally reliable, like any performance vehicle, issues can arise. Common areas to monitor include the transmission (especially if frequently driven hard), suspension components, and the cooling system. Addressing issues promptly is key.

Actionable Insight: For prospective buyers, a pre-purchase inspection by a qualified mechanic specializing in performance vehicles is highly recommended. Look for evidence of regular maintenance and check for any signs of abuse or modifications.

Pricing Information: Jeep Grand Cherokee SRT 6.4 Specs (Used Market)

Since the 6.4L HEMI SRT Grand Cherokee was produced from 2012 to 2017 (before the introduction of the Trackhawk and the subsequent discontinuation of the WK2 platform), prices listed below are for the used market and will vary significantly based on mileage, condition, optional features, and geographical location.

Model Year	Original MSRP (Approx.)	Used Price Range (USD)	Key Specs & Features
2012	$54,495	$18,000 – $28,000	6.4L HEMI (470hp), 5-sp Auto (early), Brembo, SRT-tuned suspension.
2013	$60,920	$20,000 – $30,000	6.4L HEMI (470hp), 5-sp Auto, Uconnect, Performance Pages.
2014	$63,995	$24,000 – $36,000	8-speed Auto introduced, 6.4L HEMI (470hp), improved interior tech.
2015	$65,995	$28,000 – $40,000	6.4L HEMI (475hp), 8-speed Auto, Launch Control, active exhaust.
2016	$66,895	$32,000 – $45,000	6.4L HEMI (475hp), 8-speed Auto, updated infotainment options.
2017	$67,895	$35,000 – $50,000+	6.4L HEMI (475hp), 8-speed Auto, final year for 6.4L SRT (pre-Trackhawk).

Note: Prices are estimates and can fluctuate based on market demand, vehicle condition, mileage, and specific options.

Frequently Asked Questions (FAQ)

Q1: Is the Jeep Grand Cherokee SRT 6.4L a good daily driver?
A1: Yes, absolutely. While it’s a high-performance vehicle, its adaptive suspension, comfortable interior, and standard SUV practicality make it surprisingly good for daily commuting, though its fuel economy is a trade-off.

Q2: What’s the main difference between the 6.4L SRT and the Hellcat-powered Trackhawk?
A2: The primary difference is the engine. The 6.4L SRT is naturally aspirated with 470-475 hp, while the Trackhawk features a supercharged 6.2L HEMI Hellcat engine producing 707 hp. The Trackhawk is significantly faster and more expensive.

Q3: What kind of fuel does the 6.4L SRT require?
A3: The 6.4L HEMI engine requires premium octane fuel (91+ RON). Using lower octane fuel can lead to reduced performance and potential engine knock or long-term damage.

Q4: Can the Jeep Grand Cherokee SRT 6.4L go off-road?
A4: While it’s a Jeep, the SRT is optimized for on-road performance. Its low ground clearance, stiff suspension, and performance-oriented tires make it unsuitable for serious off-roading. It can handle light snow or gravel roads, but it’s not designed for rock crawling or deep mud.

Q5: What are common maintenance concerns for the 6.4L SRT?
A5: Common concerns include higher costs for tires and brake components due to their performance nature. Fuel consumption is also high. The engine and transmission are generally robust, but like any high-performance vehicle, proper and timely maintenance is crucial to avoid issues.

Q6: What is the towing capacity of the Grand Cherokee SRT 6.4L?
A6: The towing capacity for the Grand Cherokee SRT 6.4L is typically around 7,200 pounds (3,266 kg), making it capable of towing decent-sized trailers, boats, or even another car.

Conclusion

The Jeep Grand Cherokee SRT 6.4L is more than just an SUV; it’s a testament to the idea that practicality doesn’t have to sacrifice exhilaration. With its mighty 6.4-liter HEMI V8, sophisticated drivetrain, and performance-tuned chassis, it offers a unique blend of muscle car performance, comfortable touring capability, and all-weather versatility. While ownership comes with the expected considerations of a high-performance vehicle – notably fuel consumption and maintenance costs – the thrill of its acceleration, the rumble of its exhaust, and the surprising agility it demonstrates make it a truly compelling and unique proposition in the automotive landscape. For those seeking an SUV that delivers an unapologetic dose of American muscle, the Grand Cherokee SRT 6.4L remains a standout choice.