The Jeep Grand Cherokee SRT 6.4 V8, produced from 2017 to 2021, represents the high-performance variant of the fourth-generation Grand Cherokee (WK2) following its facelift. Positioned as the flagship model, it aimed to deliver a blend of luxury, capability, and exhilarating performance. This iteration built upon the established Grand Cherokee platform, offering a significantly more potent powertrain and enhanced driving dynamics compared to lower trims. It served as Jeep’s answer to performance SUVs from European and domestic manufacturers, appealing to buyers seeking a powerful and refined SUV experience.
Technical Specifications
| Brand | Jeep |
| Model | Grand Cherokee |
| Generation | Grand Cherokee IV (WK2, facelift 2017) |
| Type (Engine) | SRT 6.4 V8 (475 Hp) 4×4 Automatic |
| Start of production | 2017 |
| End of production | 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban (EPA) | 18.1 l/100 km (13 US mpg, 15.6 UK mpg, 5.5 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 12.4 l/100 km (19 US mpg, 22.8 UK mpg, 8.1 km/l) |
| Fuel consumption (economy) – combined (EPA) | 15.7 l/100 km (15 US mpg, 18 UK mpg, 6.4 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 4.3 sec |
| Maximum speed | 257 km/h (159.69 mph) |
| Weight-to-power ratio | 5 kg/Hp, 201.6 Hp/tonne |
| Weight-to-torque ratio | 3.7 kg/Nm, 270.4 Nm/tonne |
| Power | 475 Hp @ 6000 rpm |
| Power per litre | 74 Hp/l |
| Torque | 637 Nm @ 4300 rpm (469.83 lb.-ft. @ 4300 rpm) |
| Maximum engine speed | 6400 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | HEMI / ESG |
| Engine displacement | 6417 cm3 (391.59 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 103.9 mm (4.09 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 10.9:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV, VVT |
| Engine oil capacity | 6.6 l (6.97 US qt | 5.81 UK qt) |
| Coolant | 15.5 l (16.38 US qt | 13.64 UK qt) |
| Kerb Weight | 2356 kg (5194.09 lbs.) |
| Max. weight | 2948 kg (6499.23 lbs.) |
| Max load | 592 kg (1305.14 lbs.) |
| Trunk (boot) space – minimum | 1028 l (36.3 cu. ft.) |
| Trunk (boot) space – maximum | 1934 l (68.3 cu. ft.) |
| Fuel tank capacity | 93.1 l (24.59 US gal | 20.48 UK gal) |
| Permitted trailer load with brakes (12%) | 3266 kg (7200.3 lbs.) |
| Length | 4822 mm (189.84 in.) |
| Width | 1943 mm (76.5 in.) |
| Width including mirrors | 2154 mm (84.8 in.) |
| Height | 1724 mm (67.87 in.) |
| Wheelbase | 2914 mm (114.72 in.) |
| Front track | 1636 mm (64.41 in.) |
| Rear (Back) track | 1645 mm (64.76 in.) |
| Ride height (ground clearance) | 206 mm (8.11 in.) |
| Drag coefficient (Cd) | 0.37 |
| Minimum turning circle (turning diameter) | 11.6 m (38.06 ft.) |
| Approach angle | 18° |
| Departure angle | 23.1° |
| Ramp-over (brakeover) angle | 18.4° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 380×34 mm |
| Rear brakes | Ventilated discs, 350×28 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 295/45 R20 |
| Wheel rims size | 10J x 20 |
INTRODUCTION
The 2017-2021 Jeep Grand Cherokee SRT 6.4 V8 is a performance-oriented SUV that slots into the top tier of the WK2 Grand Cherokee lineup. Following the mid-cycle refresh of the WK2 platform, the SRT model received subtle styling updates and continued to offer a compelling combination of on-road performance and off-road capability. It was designed to compete with high-performance SUVs like the Porsche Cayenne, BMW X5 M, and Mercedes-AMG GLE, offering a uniquely American take on the segment.
Powertrain & Engine Architecture
At the heart of the SRT is the 6.4-liter (392 cubic inch) HEMI V8 engine, designated as the ESG engine code. This naturally aspirated powerplant produces 475 horsepower at 6000 rpm and 470 lb-ft of torque at 4300 rpm. The engine utilizes a multi-port fuel injection system and features variable valve timing (VVT) to optimize performance and efficiency. A key feature is the Fuel Saver Technology, a cylinder deactivation system that shuts down four cylinders during light-load cruising to improve fuel economy. The engine is longitudinally mounted and paired exclusively with an eight-speed TorqueFlite 8HP70 automatic transmission. This transmission is known for its smooth shifts and quick response, contributing to the SRT’s acceleration capabilities. The transmission is electronically controlled and features paddle shifters for manual gear selection.
Driving Characteristics
The SRT 6.4 V8 delivers a noticeably different driving experience compared to other Grand Cherokee trims. The substantial torque output provides strong acceleration in all gears, with a 0-60 mph time of around 4.3 seconds. The eight-speed transmission is well-tuned for both performance and comfort, offering quick downshifts for overtaking and smooth upshifts during normal driving. While the SRT is capable off-road, its performance-tuned suspension and lower profile tires prioritize on-road handling. The suspension is stiffer than other Grand Cherokee models, resulting in reduced body roll and improved cornering stability. However, this also means a slightly less compliant ride over rough surfaces. The active exhaust system provides a distinctive V8 rumble, enhancing the overall driving experience.
Equipment & Trim Levels
The SRT trim came standard with a comprehensive list of features, including leather upholstery with suede inserts, performance seats with enhanced bolstering, a flat-bottom steering wheel, and a premium audio system. Standard exterior features included a unique SRT grille, body-color cladding, quad exhaust outlets, and 20-inch alloy wheels. Optional extras included a dual-pane panoramic sunroof, adaptive cruise control, blind-spot monitoring, and a rear entertainment system. The interior typically featured a dark color scheme with red accents, emphasizing the SRT’s performance character.
Chassis & Braking
The SRT features a modified chassis compared to other Grand Cherokee models, with stiffer springs, upgraded dampers, and larger stabilizer bars. The rear suspension utilizes independent multi-link setup. The braking system consists of ventilated discs at all four corners, with larger rotors and Brembo calipers at the front (380×34 mm) and rear (350×28 mm) for improved stopping power. The SRT also includes an electronic stability control system with selectable driving modes, allowing drivers to adjust the vehicle’s handling characteristics.
Market Reception & Comparison
The Jeep Grand Cherokee SRT 6.4 V8 was generally well-received by automotive critics, who praised its powerful engine, responsive handling, and luxurious interior. However, its fuel economy was often criticized, as expected for a vehicle of this size and performance. Compared to the standard Grand Cherokee trims, the SRT offered a significant performance upgrade but came at a higher price point. It also differed from the diesel-powered Grand Cherokee models, which prioritized fuel efficiency and towing capacity. The SRT appealed to buyers who wanted a performance SUV with a distinctive American character.
Legacy
The SRT 6.4 V8 Grand Cherokee remains a popular choice in the used car market, particularly among enthusiasts seeking a powerful and capable SUV. The HEMI V8 engine is known for its reliability, although regular maintenance is essential. The eight-speed automatic transmission has also proven to be durable. While fuel economy is not a strong point, the SRT’s overall performance and features continue to make it a desirable vehicle. Its blend of performance, luxury, and off-road capability has cemented its place as a standout model in the Grand Cherokee lineage.
