2008-2009 Jeep Grand Cherokee III (WK) 4.7i V8 (309 Hp) Automatic

Technical Specifications

The Jeep Grand Cherokee III (WK) 4.7i V8 Automatic, produced from 2008 to 2009, was a key variant within the popular WK generation (2005-2010) of the Grand Cherokee. This model occupied a mid-to-upper position in the lineup, offering a compelling blend of V8 power, comfortable ride quality, and the Jeep brand’s renowned off-road capability. It was primarily targeted at the North American market, where large, body-on-frame SUVs with substantial engines remained in high demand. The 4.7i V8 Automatic served as a stepping stone between the more economical V6-powered models and the high-performance SRT8 trim, appealing to buyers seeking a balance of features and performance.

Powertrain & Engine Architecture

At the core of this Grand Cherokee variant lies the 4.7-liter V8 engine, internally known as the EVE. This engine belongs to Chrysler’s third-generation small-block V8 family, a design known for its robustness and relatively straightforward engineering. The EVE features a cast iron block for durability, topped with aluminum cylinder heads to reduce weight. It utilizes a single overhead camshaft (SOHC) valvetrain operating two valves per cylinder, and employs multi-point fuel injection for precise fuel delivery. The 4.7L V8 generated 309 horsepower at 5,650 rpm and 334 lb-ft of torque at 3,950 rpm. The engine’s design philosophy emphasized low-end torque, making it well-suited for towing and everyday driving situations. The engine was mated to a five-speed automatic transmission, typically the 545RFE, selected for its smooth shifting characteristics and ability to handle both on-road cruising and moderate off-road conditions. This transmission incorporated electronically controlled shifting and overdrive capabilities to enhance fuel efficiency during highway travel.

Driving Characteristics

The 4.7i V8 Automatic Grand Cherokee delivered a distinctly different driving experience compared to its V6 counterparts. Acceleration was noticeably quicker, providing confident passing power, although it didn’t quite match the outright performance of the SRT8. The automatic transmission offered smooth and generally predictable shifts, though it could occasionally exhibit some hesitation during rapid acceleration or overtaking maneuvers. The gear ratios were carefully tuned to strike a balance between responsive acceleration and reasonable fuel economy. While possessing capable off-road potential, the rear-wheel-drive configuration and the vehicle’s substantial weight meant it wasn’t as agile or sure-footed in challenging off-road scenarios as the available four-wheel-drive models. The suspension, calibrated for comfort, effectively absorbed road imperfections, but this came at the cost of some body roll during cornering.

Equipment & Trim Levels

The 4.7i V8 Automatic Grand Cherokee came standard with a respectable array of features, including air conditioning, power windows and door locks, a CD player with an auxiliary audio input, and cloth upholstery. Stepping up to higher trim levels, such as the Limited, added premium features like leather upholstery, heated front seats, a more sophisticated sound system, and automatic climate control. A range of optional extras were also available, including a navigation system, a power sunroof, and a rear-seat entertainment system. The interior design prioritized functionality and comfort, though it didn’t necessarily reach the levels of luxury found in some European-branded SUVs.

Chassis & Braking

The WK Grand Cherokee employed a traditional body-on-frame construction, a design choice that contributed to its robust durability and off-road prowess. The front suspension utilized an independent double-wishbone setup, providing a comfortable ride and reasonable handling. The rear suspension featured a solid axle with coil springs, a configuration favored for its strength and off-road capability. Braking was provided by ventilated disc brakes on all four wheels, enhanced by an Anti-lock Braking System (ABS) to maintain control during hard braking. The braking performance was adequate for the vehicle’s weight, but not particularly sporty. The standard tire size was 245/65R17, offering a good compromise between ride comfort and traction in various conditions.

Market Reception & Comparison

The 4.7i V8 Automatic Grand Cherokee generally received positive reviews from both automotive critics and consumers. It was lauded for its powerful engine, comfortable ride quality, and spacious interior. However, its fuel economy was a frequent point of criticism, particularly when compared to the V6 models and newer, more fuel-efficient SUVs entering the market. Compared to the 3.7L V6 Grand Cherokee, the 4.7L offered a substantial increase in power and towing capacity, but at the expense of fuel efficiency. In contrast to the SRT8, it provided a more accessible entry point into V8 Grand Cherokee ownership, sacrificing some outright performance for a lower price point. The 4.7L engine also demonstrated a reputation for reliability, proving to be more dependable than some of the more technologically advanced engine options available in the WK generation.

Legacy

The 4.7i V8 Automatic Grand Cherokee has established itself as a relatively reliable vehicle in the used car market. The 4.7L V8 engine, while not known for exceptional fuel economy, is recognized for its durability and relatively simple maintenance requirements. Common issues, such as oil leaks and occasional sensor failures, are generally not considered major concerns. Today, these Grand Cherokees represent an affordable and capable SUV option for buyers seeking a robust vehicle with V8 power. Its combination of American muscle and SUV practicality continues to resonate with a diverse range of consumers, making it a popular choice in the used vehicle market.