How Much Power Does the 2015 Jeep Grand Cherokee Overland 5.7 Hemi Deliver?

The 2015 Jeep Grand Cherokee Overland equipped with the 5.7 L Hemi V8 has long been a reference point for drivers who crave a mix of luxury and raw muscle. If you’ve ever wondered just how many horses are under the hood, you’re in the right place. Below we break down the official horsepower rating, what it means on the road, and how the Overland trim stacks up against its siblings.

Engine Overview and Power Output

The 5.7 L Hemi V8 in the 2015 Grand Cherokee Overland is rated at 357 horsepower and 390 lb‑ft of torque. This output is channeled through a 5‑speed automatic transmission, which was standard for the Overland at the time. The engine’s hemispherical combustion chambers, forged‑steel connecting rods, and dual‑unleaded fuel injection help it achieve that figure while still meeting EPA emissions standards.

How Horsepower Translates to Real‑World Performance

357 hp might sound impressive on paper, but the driving experience tells the full story. In a rear‑wheel‑biased test, the Overland typically clocks the 0‑60 mph sprint in about 6.8 seconds, a respectable time for a midsize SUV of its weight (around 4,800 lb). When you throw the vehicle into a highway merge, the torque surge at low rpm makes the acceleration feel effortless.

Beyond straight‑line speed, the Hemi’s torque curve gives the Overland a solid towing capacity of up to 7,200 lb when properly equipped. That means a loaded trailer or a small boat can be hauled without the engine screaming for breath. Off‑road, the power delivery is smooth enough to keep the wheels planted on loose surfaces while the Jeep’s four‑wheel‑drive system does the heavy lifting.

Comparing the Overland Trim to Other Configurations

The Overland isn’t the only Grand Cherokee that can sport the 5.7 Hemi, but it’s the most upscale version to receive it as standard. Here’s a quick snapshot of how the Overland’s power package compares with other 2015 trims:

• Sport (3.6 L V6) – 290 hp, 260 lb‑ft torque; more fuel‑efficient but slower off the line.
• Limited (5.7 Hemi optional) – Same 357 hp, but fewer luxury touches; over‑the‑air infotainment is optional.
• Overland (5.7 Hemi standard) – Full suite of leather, wood trim, and upgraded sound system paired with the 357 hp engine.
• Summit (5.7 Hemi with performance package) – Adds a sport‑tuned suspension and slightly quicker 0‑60 times, though horsepower remains unchanged.

The Overland’s blend of power and premium appointments makes it a sweet spot for buyers who want both comfort and capability.

Factors That Influence Perceived Power

Horsepower is only one piece of the performance puzzle. Several other elements shape how the 5.7 Hemi feels behind the wheel:

• Vehicle weight – The Grand Cherokee’s solid build adds mass, which can soften the sense of acceleration compared to a lighter sports sedan.
• Transmission gearing – The 5‑speed automatic’s tall top gear favors highway fuel economy, but it can make the low‑end launch feel a bit less punchy than a newer 8‑speed.
• Altitude and temperature – Like any naturally aspirated engine, the Hemi loses a few horsepower at high elevations or extreme heat, though the loss is usually modest.
• Fuel quality – Using premium gasoline can marginally improve throttle response, but the engine is calibrated for regular unleaded.

All told, the Overland’s power feels robust for everyday driving, especially when you consider its upscale amenities.

What the 5.7 Hemi Means for Fuel Economy

The EPA rates the 2015 Grand Cherokee Overland with the 5.7 Hemi at roughly 15 mpg city and 22 mpg highway. While these numbers don’t win any fuel‑efficiency awards, they’re typical for a V8‑powered SUV of this size. Drivers who prioritize mileage often opt for the 3.6 L V6, but those who need the extra pulling power generally accept the trade‑off.

Maintenance Considerations for the Hemi

Keeping the 5.7 Hemi humming requires regular oil changes (every 5,000–7,500 mi) and occasional spark‑plug inspections. The engine’s timing chain is designed to last the vehicle’s lifetime, but it’s wise to listen for any rattling noises as the miles add up. A well‑maintained Hemi can easily surpass 150,000 mi with minimal loss of performance.

FAQ

What is the horsepower rating of the 5.7 Hemi in the 2015 Grand Cherokee Overland?

The engine produces 357 horsepower and 390 lb‑ft of torque.

How does the 5.7 Hemi affect fuel economy compared to the 3.6 L V6?

Expect about 2–3 mpg lower fuel‑economy figures; the Hemi averages 15 mpg city and 22 mpg highway, whereas the V6 typically reaches 17 mpg city and 24 mpg highway.

Can the Overland tow a trailer with the 5.7 Hemi?

Yes, when properly equipped the Overland can tow up to 7,200 lb, making it suitable for small boats, campers, or utility trailers.