2021 RAM 2500 diesel Regular Cab

MSRP $43,495 - $50,320

Ranked #1 in Fullsize Pickup-truck

2021 RAM 2500 diesel Regular Cab Price, Review, Ratings and Pictures

Updated on: July 7, 2021

Nathan Dyer's image
Nathan Dyer 

Senior Editor


This generation of RAM 2500 trucks was introduced in 2019 and for 2021 the RAM 2500 Regular Cab comes unchanged with no major updates. The RAM 2500 heavy-duty trucks have always come with impressive towing and payload capacities and great interior quality compared to the competition. The engine under the hood is a 6.7L Cummins Turbo Diesel Inline-6 that comes with loads of torque on offer all the way through the rev band. The pricing of the RAM 2500 Diesel Regular Cab starts at $46,115 and goes up to $52,865 for the highest available trim option. 

More from 2021 RAM 2500 diesel Regular Cab

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Pros

Impressive interior quality

Capable towing and payload capacities

Slower than competition

Cons

A diesel engine is noisy

Old and outdated transmission

Fewer trim options in the diesel regular cab model

What's New?

Remains unchanged for 2021


Features

vehicle bio

base price

$43495

bodystyle

2dr Regular Cab

engine type

transmission

6 speed Automatic

warranty

roadside assistance

No


Pictures & Videos


Trims

Tradesman$43,495 onwards

Big Horn$47,420 onwards

Colors and Styles

2021 RAM 2500 diesel Regular Cab in Granite Crystal Metallic Clear Coat color
Granite Crystal Metallic Clear Coat

Vehicle images are guides only and may not reflect the model's exact specifications/features– exact specifications/features should be confirmed with the seller.

Ratings

Engine and Performace

9.0

Pricing and Features

9.0

Fuel Economy

6.0

Interior

7.0

Exterior

8.0

Safety

9.0

Competition

9.0

8.1

OVERALL RATING

Expert Review, Pricing Analysis and Buying Guide

8.1

Overall Rating


The RAM 2500 is available in both 2WD and 4WD configurations and comes in two trim options which are Tradesman and the Big Horn which is called Lone Star exclusively in Texas. The RAM 2500 competes with the 2021 Ford F-250 Diesel Regular Cab, 2021 Chevrolet Silverado 2500HD Diesel Regular Cab, and the 2021 GMC Sierra 2500HD Diesel Regular Cab. The RAM is the least expensive option in the segment while also comes with the smallest engine which is by no means small in terms of performance. Let’s see how the RAM holds up against the competition. 

2021 RAM 2500 diesel Regular Cab front view
2021 RAM 2500 diesel Regular Cab rear view

6.0/10
Fuel Economy

7.0/10
Interior

8.0/10
Exterior

9.0/10
Safety

9.0/10
Competition


2021 RAM 2500 diesel Regular Cab Features

The 2021 RAM 2500 Diesel Regular Cab is available in two trims, which are the base Tradesman and the higher Big Horn. Both of the trims are available in both 2WD as well 4WD variants with the same powertrain combination. The engine is a 6.7L Cummins Turbo Diesel Inline-6 mated to a 6-speed automatic transmission. The Tradesman trim comes with the basic barebone features and interior cabin while the Big Horn offers better-upgraded cloth seats and more features. 

The Big Horn trim is called Lone Star for Texas buyers as Texas particularly loves trucks. Important packages on offer include the Chrome Appearance Group, Tradesman Level 2 Equipment Group, and Safety Group packages for the base trim. The Big Horn trim, however, gets more available package options including the Sport Appearance Package, Level 1 Equipment Group, and Level B Equipment Group packages which adds much more features to the standard options. 

Trims

Tradesman

Big Horn/Lone Star

MSRP

$46,115 (2WD)

$49,015 (4WD)

$49,965 (2WD)

$52,865 (4WD)

Key Features

Black / Diesel Gray Interior Colors

Available Black / Light Mountain Brown Interior Colors

 

Black front and rear bumpers

Chrome front and rear bumpers

 

17-inch steel wheels

18-inch Chrome Steel wheels

 

UConnect 3 with 5-inch touchscreen

Cloth seats

 

Active Grille shutters

Electronic Trailer Brake Control

 

Push-button start

Remote Keyless Entry

 

4-Way Manual Adjustable Front Passenger Seat

2-Way Power Lumbar Adjustable Driver Seat

 

Available Blind-Spot with Tag Trailer & Cross-Path Detection

8-Way Power-Adjustable Driver Seat

We Recommend

The Big Horn trim is the best option as it gets some extra features over the base Tradesman trim. Equipped with the Sport appearance Package, it would look much better, and if further equipped with the Level 1 Equipment Group or Level B Equipment Group packages, the big Horn model would be as luxurious and feature-rich as the higher-end trim of 2500 which are not available in a regular cab configuration. The Big Horn model gets a plethora of options and available packages, making it the ideal choice for anyone.

2021 RAM 2500 diesel Regular Cab Engine and Performance

The engine powering the RAM 2500 diesel is a 6.7L Turbo Diesel Inline-6 from Cummins mated to a 6-speed automatic transmission. It is available in both 2WD as well as 4WD configurations. The engine produces 370 hp and 850 lb-ft of power and torque. The power output is plenty and the vehicle is strong and delivers impressive performance. But the transmission is definitely outdated and is just a 6-speed unit whereas all of the competition is miles ahead with 10-speed units. 

2021 RAM 2500 diesel Regular Cab side view

When it comes to straight-line speed, the RAM 2500 is definitely not the best in the segment. It is certainly a strong contender reaching 60mph in 8.3 seconds and crossing the quarter-mile mark in 16.3 seconds. The RAM 2500 is limited to a top speed of 103 miles which is actually on the higher side in the segment. The diesel engine has a lot of torque, but the noise and the tone of the engine are not very enjoyable but it doesn’t creep into the cabin much because of the good cabin noise isolation.

Models

2021 RAM 2500 Diesel Regular Cab

2021 Ford F-250 Diesel Regular Cab XL

2021 Chevrolet Silverado 2500HD Diesel Regular Cab WT

2021 GMC Sierra 2500HD Diesel Regular Cab

MSRP

$46,115 (2WD)

$49,015 (4WD)

$46,420 (4WD)

$49,210 (4WD)

$48,985 (2WD)

$51,785 (4WD)

$50,010 (2WD)

$52,810 (4WD)

Engine

6.7L Cummins Turbo Diesel Inline-6

6.7 L Powerstroke Turbo Diesel 

6.6L Duramax Turbo-Diesel V8

6.6L Duramax Turbo-Diesel V8

Drivetrain

2WD/4WD

2WD/4WD

2WD/4WD

2WD/4WD

Transmission

6-speed automatic transmission

10-speed automatic transmission

10-speed automatic transmission

10-speed automatic transmission

Power (hp @ rpm)

370 hp

475 hp at 2,600 RPM

445 hp @ 2800 rpm

445 hp @ 2800 rpm

Torque (lb-ft @ rpm)

850 lb-ft @ 1,700 rpm

1,050 lb-ft @ 1600 rpm

910 lb-ft @ 1600 rpm

910 lb-ft @ 1600 rpm

0-60 mph (sec)

8.3

6.1

6.2

6.5

Quarter Mile (sec)

16.3

14.6

14.7

15.0

Top Speed (mph)

103

95

98

98

Towing Capacity (lbs)

20,000

20,000

18,510

18,510

Payload Capacity (lbs)

4,010

4,260

3,715

3,715

The 2021 RAM 2500 is a capable contender but happens to be the slowest and least powerful among other trucks in this comparison. All of the others come with larger V8 engines mated to more sophisticated 10-speed automatic transmissions. The Ford F-250 is the most powerful and fastest followed by the Chevy/GMC twins. The F-250 reaches 60mph in just 6.1 seconds while both the Chevy and GMC achieve the same feat in marginally slower times. However, the RAM and the F-250 come with the best towing and payload capacities as evident from the table, making the Ford the best performer in terms of power outputs, speed, and capability.

How well does the 2021 RAM 2500 Diesel Regular Cab Drive and Handle?

Handling and driving dynamics are not factors associated with such a huge truck like the RAM 2500. There is enough power on offer, but the handling is blunt and not engaging. But it is pretty well drivable in slow speeds in the city as well as in the twisties in medium speeds. However, the driving experience would by no means be engaging or enthusiastic as mentioned earlier. This is a machine aimed at high performance in terms of towing and carrying and that it does very well.

All of the competitions are on similar turf in terms of handling. The Ford F-250 diesel is the most powerful, but in terms of handling, it is dull and its steering feels numb. It is also more difficult to maneuver in the urban environment. The Chevy performs slightly better but the GMC is the best one to drive around. It is the one that adapts to corners in the best rhythm while not affecting ride comfort very much. The RAM is a good performer in terms of ride quality but in the handling department, it fails to impress. 

How efficient is the braking performance of the 2021 RAM 2500 Diesel Regular Cab? 

The 2021 RAM 2500 is equipped with 14.2-inch brake rotors in the front and 14.1-inch ones in the rear offering good braking power. Good, I said, but it is definitely not the best. These brakes bring the huge truck to a stop at a distance of 140ft. The weight of the RAM 2500 is on the higher side compared to the gas-powered iteration of the same vehicle but happens to be on the lower side of the spectrum compared to the competition which also affects the braking performance. 

Model

2021 RAM 2500 Diesel Regular Cab

2021 Ford F-250 Diesel Regular Cab XL

2021 Chevrolet Silverado 2500HD Diesel Regular Cab WT

2021 GMC Sierra 2500HD Diesel Regular Cab

Brake Rotors Front

14.2

14.3

14.0

14.0

Brake Rotors Rear

14.1

14.3

14.1

14.1

Curb Weight

5,989

5,677

6,105

6,105

Braking Distance 60-0 (ft.)

140

138

135

138

The Chevy Silverado 2500HD is the best performer in terms of braking and stops at a distance of 135ft. The GMC and the Ford follow with similarly capable braking capabilities leaving the RAM at last. But the RAM also stops at a respectable distance which actually puts all of the competition on a similar turf in terms of braking. Hence, the RAM 2500 can be termed as a good option based on braking performance.

2021 RAM 2500 diesel Regular Cab Fuel Economy

6.0/10

Being a diesel-powered truck, the RAM 2500 is expected to deliver better fuel economy compared to its gas-powered counterparts. And the RAM 2500 diesel does provide better fuel economy figures. It delivers combined fuel efficiency of around 19 mpg. Combined with a fuel tank of 32 gallons, the RAM 2500 provides a combined range of around 608 miles all of which are good numbers. 

Models

2021 RAM 2500 Diesel Regular Cab

2021 Ford F-250 Diesel Regular Cab XL

2021 Chevrolet Silverado 2500HD Diesel Regular Cab WT

2021 GMC Sierra 2500HD Diesel Regular Cab

MPG (City)

N/A

N/A

N/A

N/A

MPG (Highway)

N/A

N/A

N/A

N/A

MPG (Combined)

19

16

19

17

Fuel Capacity (Gallons)

32.0

34.0

36.0

36.0

Range (Combined, in Miles)

608

544

684

612

The most powerful among the competition, which is the Ford F-250 is also the most fuel-guzzling one. The Ford doesn’t satisfy us with its combined fuel economy of around 16 miles. The Chevy and the RAM are the absolute best performers in terms of fuel economy delivering similar numbers. The Chevy with the larger fuel capacity also happens to one that can travel longer without refill. The RAM 2500 however is a worthy contender in the fuel economy segment. 

2021 RAM 2500 diesel Regular Cab Interior

7.0/10

The interior of the RAM 2500 in the base Tradesman time is fairly skeletal and comes with very limited features but great build quality. The interior and seats are trimmed in Black/Diesel Gray as standard and it can be trimmed in just Black as an available option. Whereas the higher Big Horn trims can opt-in Black/Light Mountain Brown interior colors as standard while there are also options including Black/Light Frost Beige on offer along with other options. 

2021 RAM 2500 diesel Regular Cab front seats

The interior features a heavy-duty vinyl 40/20/40 split-bench seat in the Tradesman while there are more premium Cloth upholstered seats in the Big Horn trim. The Big Horn trim can also opt with bucket seats which offer better support and adjustability. The seats are spacious and comfortable while the space on the inside is not the best although it is pretty good. The RAM 2500 is only available with an 8ft. long bed which is the standard in the segment for regular cab models. 

Models

2021 RAM 2500 Diesel Regular Cab

2021 Ford F-250 Diesel Regular Cab XL

2021 Chevrolet Silverado 2500HD Diesel Regular Cab WT

2021 GMC Sierra 2500HD Diesel Regular Cab

Seating Capacity

3

3

3

3

Front Row (Headroom/Shoulder Room/Leg Room, in inches)

39.8/65.9/40.9

40.8/66.7/43.9

43.1/66.1/44.5

43.1/66.1/44.5

Bed Length (ft.)

8

8

8

8

The RAM is more elegant and has a creatively designed interior. The material and quality are great and the button layout is well-organized. The Ford also has a higher quality and well-designed interior whereas the Chevy and the GMC lack interior quality and sports a dated dashboard layout. The RAM definitely wins in terms of interior quality and the overall looks being a great option in the segment. The following are some of its standout interior features-

  • Cloth 40/20/40 Bench Seat
  • 8-Way Power-Adjustable Driver Seat
  • 4-Way Manual Adjustable Front Passenger Seat
  • 2-Way Power Lumbar Adjustable Driver Seat
  • Heated Front Seats
  • Leather-Wrapped 4-spoke Steering Wheel 

How intuitive is the 2021 RAM 2500 Diesel Regular Cab’s infotainment unit?

The infotainment unit in the RAM 2500 Diesel Regular Cab is Uconnect 3 with a 5-Inch touchscreen display which is not very intuitive or updated. However, there is the available option to upgrade to a Uconnect 4 infotainment system with an 8.4-Inch display or even an even larger 12.0-Inch display with navigation. As for audio, the tradesman trim comes as standard with 4 speakers while there are 6 in the Big Horn. There is also the available option to upgrade to a more premium 7-Speaker system with an amplifier from Alpine.

2021 RAM 2500 diesel Regular Cab infotainment screen

Most of the needed infotainment features are available options in this truck including Android Auto and Apple CarPlay. 

  • Cluster 3.5" TFT B&W Display available in color
  • Standard Uconnect 3 with 5-Inch Display
  • 6 Speakers
  • Media Hub with 2 USB and Aux connectivity
  • Integrated Voice Command with Bluetooth
  • Available Apple CarPlay and Android Auto
  • SiriusXM with 6-Month Radio Sub

2021 RAM 2500 diesel Regular Cab Exterior

8.0/10

The RAM 2500 is one of the better-looking trucks in the segment, offering a distinct design language. The RAM has a more sporty design language while others are all just bricks with textures on them. The RAM 2500 in the Tradesman trim is very basic and doesn’t come with many bells and whistles or beauty elevating elements on the outside. The Big Horn, however, comes with a slightly more beautiful exterior with touches of chrome and more body-colored elements. 

2021 RAM 2500 diesel Regular Cab 

The RAM 2500 is more on the sporty side when it comes to exterior beauty. The wheels that come as standard are 17-inch steel-styled ones in the Tradesman trim while the Big Horn trim features larger 18-inch inch steel chrome-clad wheels. 18-inch polished aluminum wheels are also available as an option. The RAM 2500 can be made to look much better by opting for the Sport Appearance Package that adds many styling elements not only on the outside but also inside the cabin. 

Models

2021 RAM 2500 Diesel Regular Cab

2021 Ford F-250 Diesel Regular Cab XL

2021 Chevrolet Silverado 2500HD Diesel Regular Cab WT

2021 GMC Sierra 2500HD Diesel Regular Cab

Curb Weight (lbs)

5,989

5,677

6,105

6,105

Length (inches)

232.0

231.8

235.5

235.5

Width (inches)

79.4

80.0

81.8

81.8

Height (inches)

78.0

78.9

79.9

79.9

Ground Clearance (inches)

13.0

8.7

102

10.2

Wheelbase (inches)

140.0

141.6

141.6

141.6

There is not much beauty to be found among any of these trucks. But just by a glance, it can be found that the RAM looks much better than the competition. It has got better looks and has a mode-defined front end while all others are just flat and plain. The Chevy and the GMC are the larger looking ones and they are actually the bigger ones in terms of dimensions and weight also. The Ford is the lightest among the competition while the RAM stays in the middle ground. The following are some of its standout safety features-

  • Automatic Headlamps
  • Halogen Quad Headlamps
  • Black/Painted Front and Rear Bumpers
  • Winter Front Grille-Cover by Mopar
  • Grille-Gloss Black Billets with Chrome
  • Available Deployable Bed-Step by Mopar
  • Available Black/Chrome Tubular Side Steps by Mopar

2021 RAM 2500 diesel Regular Cab Safety

9.0/10

The 2021 RAM 2500 comes with a fairly basic set of safety features as standard which are extremely essential for a road vehicle. It features traction control Blind-Spot with Tag Trailer & Cross-Path Detection and Trailer Sway Damping as standard while many of the features are optional. However, the RAM 2500 is a safe vehicle as it ticks most of the boxes considering the basic safety features. It has not been tested or rated by either NHTSA or IIHS, so these ratings are not available for analysis and comparison. The following are some of the other safety features in the RAM 2500 Diesel Regular Cab-

  • ParkSense Front and Rear Park-Assist System
  • Full-Speed Forward-Collision Warning Plus
  • Lane-Keep Assist
  • Tire Pressure Monitoring Display
  • Safety & Security Systems
  • Electronic Roll Mitigation

2021 RAM 2500 diesel Regular Cab Competition

9.0/10

2021 RAM 2500 Diesel Regular Cab vs 2021 Ford F-250 Diesel Regular Cab

The Ford F-250 is definitely the more powerful option among the two as it is just the best in the segment in terms of power output and speed. The RAM however is the more fuel-efficient option by a significant margin. The Ford also comes with a larger cabin offering more space than the RAM. Overall the Ford F-250 would be the better option in the segment considering all of the parameters.

2021 Ford F-250 Diesel Regular Cab

2021 RAM 2500 Diesel Regular Cab vs 2021 Chevrolet Silverado 2500HD Diesel Regular Cab

The RAM is lower powered compared to the Chevy Silverado 2500HD, but it handles slightly better than the Chevy. The RAM and the Chevy come with similar amounts of fuel efficiency figures whereas the Chevy offers a better range with its bigger tank. The RAM, however, offers a better quality interior and higher towing and payload capacities making it the better choice between the two.

2021 Chevrolet Silverado 2500HD Diesel Regular Cab

2021 RAM 2500 Diesel Regular Cab vs 2021 GMC Sierra 2500HD Diesel Regular Cab

The GMC Sierra 2500HD Diesel Regular outputs more power and torque than the RAM 2500 Diesel Regular Cab. The GMC is also better handling and easier to drive a truck. The RAM, however, comes with more fuel economy and also has a more quality interior. It is also the more capable one for hauling and carrying stuff. All of this means that the RAM is the overall better choice considering all factors. 

2021 GMC Sierra 2500HD Diesel Regular Cab

 

2021 RAM 2500 diesel Regular Cab Final Verdict

The 2021 RAM 2500 Diesel Regular Cab is a great option in the segment of heavy-duty diesel pickup trucks. It is the best-looking one in the segment which has a distinct look among the very similar and bland-looking trucks. The RAM 2500 Diesel offers great amounts of torque and manageable handling. It is certainly not the fastest or best-performing one but still, it has the best towing and payload capabilities. This diesel-powered RAM also comes with a high-class interior with quality materials and a neatly laid out dashboard. Overall it is a great option to consider in the segment as it further is the cheapest and also delivers the best fuel economy.