The RAM 2500/3500 Mega Cab I, specifically the 2500 model equipped with the 5.7 Hemi V8 engine and a four-wheel drive automatic transmission, was produced from 2010 to 2012. This configuration represented a popular balance within the heavy-duty RAM lineup, offering a significant capability upgrade over the 1500 series while remaining more accessible than the Cummins diesel-powered options. Positioned as a mid-range offering, it catered to buyers needing substantial towing and payload capacity for work or recreational purposes, but who didn’t necessarily require the ultimate power of a diesel engine. The Mega Cab body style, introduced in previous years, provided an exceptionally spacious interior, particularly for rear-seat passengers, setting it apart from standard crew cab offerings.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Mega Cab I |
| Type (Engine) | 2500 5.7 Hemi V8 (383 Hp) 4×4 Automatic |
| Start of production | 2010 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5-6 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8 kg/Hp, 125.7 Hp/tonne |
| Weight-to-torque ratio | 5.6 kg/Nm, 177.8 Nm/tonne |
| Power | 383 Hp @ 5600 rpm |
| Power per litre | 67.7 Hp/l |
| Torque | 542 Nm @ 4000 rpm, 399.76 lb.-ft. @ 4000 rpm |
| Maximum engine speed | 5800 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EZC |
| Engine displacement | 5654 cm3, 345.03 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 99.5 mm, 3.92 in. |
| Piston Stroke | 90.9 mm, 3.58 in. |
| Compression ratio | 9.6:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 6.6 l, 6.97 US qt | 5.81 UK qt |
| Coolant | 17.7 l, 18.7 US qt | 15.57 UK qt |
| Kerb Weight | 3048 kg, 6719.69 lbs |
| Max. weight | 3992 kg, 8800.85 lbs |
| Max load | 944 kg, 2081.16 lbs |
| Trunk (boot) space – maximum | 1628 l, 57.49 cu. ft |
| Fuel tank capacity | 129 l, 34.08 US gal | 28.38 UK gal |
| Permitted trailer load with brakes (12%) | 3697 kg, 8150.49 lbs |
| Length | 6309 mm, 248.39 in |
| Width including mirrors | 2009 mm, 79.09 in |
| Height | 1989 mm, 78.31 in |
| Wheelbase | 4064 mm, 160 in |
| Front track | 1735 mm, 68.31 in |
| Rear (Back) track | 1732 mm, 68.19 in |
| Minimum turning circle (turning diameter) | 14.2 m, 46.59 ft |
| Approach angle | 23.4° |
| Departure angle | 27.6° |
| Ramp-over (brakeover) angle | 18.3° |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Leaf spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 245/70 R17 E; 265/70 R17 E |
| Wheel rims size | 7.5J x 17; 8.0J x 17 |
Powertrain & Engine Architecture
At the heart of this RAM 2500 was the 5.7-liter HEMI V8 engine, designated the EZC code. This engine was a member of Chrysler’s third-generation HEMI family, featuring a cast iron block, aluminum cylinder heads, and a variable valve timing (VVT) system. The VVT system optimized engine performance and fuel efficiency by adjusting valve timing based on engine speed and load. Fuel delivery was handled by a multi-port fuel injection system, providing precise fuel metering for improved combustion. The engine produced 383 horsepower at 5,600 rpm and 400 lb-ft of torque at 4,000 rpm. The engine’s robust construction and relatively simple design contributed to its reputation for reliability.
The engine was paired with a five-speed automatic transmission (typically the 545RFE). This transmission was designed to handle the high torque output of the HEMI V8 and provide smooth, reliable shifting. The automatic transmission featured electronically controlled shifting and overdrive, contributing to both performance and fuel economy. The 4×4 system utilized a part-time transfer case, allowing the driver to switch between two-wheel drive and four-wheel drive modes as needed.
Driving Characteristics
The 5.7 Hemi-equipped RAM 2500 offered a noticeable step up in performance compared to lighter-duty trucks. While not as quick as some of the higher-output gasoline or diesel options, it provided ample power for everyday driving and towing. The automatic transmission delivered smooth shifts, but could sometimes feel hesitant when downshifting for passing maneuvers. The gear ratios were optimized for towing, which meant that acceleration from a standstill wasn’t particularly brisk. However, once underway, the engine provided strong pulling power. Compared to the Cummins diesel, the 5.7 Hemi was quieter and smoother, but lacked the diesel’s immense low-end torque. The ride quality, while firm due to the heavy-duty suspension, was generally comfortable, especially with the Mega Cab’s spacious interior.
Equipment & Trim Levels
The 2500 5.7 Hemi 4×4 Automatic was available in several trim levels, including STX, SLT, and Laramie. The base STX trim offered a functional, no-frills interior with vinyl upholstery and basic features. The SLT trim added features such as cloth upholstery, power windows and locks, and a basic audio system. The Laramie trim was the most luxurious, offering leather upholstery, heated seats, a premium audio system, and additional chrome exterior trim. Standard features across most trims included air conditioning, a tilt steering wheel, and an AM/FM radio. Optional extras included a navigation system, a sunroof, and upgraded audio systems.
Chassis & Braking
The RAM 2500/3500 chassis was built around a robust frame designed to withstand heavy loads. The front suspension featured an independent multi-link design, providing a comfortable ride and good handling. The rear suspension utilized a traditional leaf spring setup, which was well-suited for hauling and towing. Braking duties were handled by disc brakes on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) was standard, enhancing safety and control during emergency braking situations. The truck’s heavy weight and robust suspension contributed to its stability and ability to handle challenging terrain.
Market Reception & Comparison
The 5.7 Hemi-powered RAM 2500 received generally positive reviews from automotive critics. It was praised for its strong engine, comfortable ride, and spacious interior. However, some critics noted that its fuel economy was relatively poor compared to diesel-powered trucks. Compared to the Cummins diesel, the 5.7 Hemi offered a lower purchase price and simpler maintenance, but lacked the diesel’s superior towing capacity and fuel efficiency. The 5.7 Hemi was often seen as a good choice for buyers who needed a capable truck for occasional towing and hauling, but didn’t want to pay the premium for a diesel engine.
Legacy
The 5.7 Hemi engine has proven to be a durable and reliable powertrain. While some maintenance items, such as the water pump and oil cooler, have been known to require attention over time, the engine itself is generally considered to be long-lasting. Today, used RAM 2500/3500 models equipped with the 5.7 Hemi engine remain popular among buyers looking for a capable and affordable heavy-duty truck. Their relatively simple design and readily available parts make them relatively easy to maintain and repair. The Mega Cab body style continues to be highly sought after for its spacious interior, making these trucks a practical choice for families and those who frequently transport passengers.
