• Oct 2, 2006


The Texas State Fair was the location of another big truck announcement last week when Dodge announced its new Cummins turbo-diesel engine for the 2007 Dodge Ram 2500 and 3500. Enlarged to 6.7 liters from 5.9 through increases in both bore and stroke, the new inline-six turbodiesel now boasts 350 horsepower and 650 ft-lbs. of torque, all while meeting stricter diesel emissions standards for 2007. The engine also features an optional exhaust brake function that improves braking under heavy towing situations, a common feature of big rigs and large motor coaches.

The new power ratings makes the 6.7-liter Cummins turbodiesel competitive with new powerplants from both Ford and General Motors, each of which has also announced new or substantially upgraded diesel motors for 2007 and beyond.

Follow the jump to see how each automaker's new diesel compares with the others.

[Source: Dodge]

2007 Dodge Ram 2500/3500
6.7-liter inline-six turbo diesel
350 horsepower at 3,000 rpm
650 ft-lbs. of torque at 1,500 rpm
Six-speed automatic

2008 Ford F-Series Super Duty (F-250, F-350, F-450)
6.4-liter V8 twin-turbo diesel
350 horsepower at 3,000 rpm
650 ft-lbs. of torque at 2,000 rpm
Five-speed automatic or six-speed manual

2007 Chevrolet Silverado and GMC Sierra 2500HD/3500HD
6.6-liter V8 turbo diesel
365 horsepower
660 ft-lbs. of torque
Six-speed automatic


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    • 1 Second Ago
  • 19 Comments
      • 8 Years Ago
      Audi 4.2 TDI // 335bhp // 479lbs-ft (Bhp/L)=79.7 // (lb-ft/L)=114

      VW 5.0L TDI // 313bhp // 553lbs-ft (Bhp/L)=62.6 // (lb-ft/L)=110.6

      BMW 4.0 TTD // 300bhp // 516lbs/ft (Bhp/L)=75 // (lb-ft/L)=129

      MB 4.2 CDI // 306bhp // 516lbs-fs (Bhp/L)=72.8 // (lb-ft/L)=122.8

      Dodge 6.7 TD // 350bhp // 650lbs-ft (Bhp/L)=52.2 // (lb-ft/L)=97

      (MB actuall Displacement is approx 4.0L)

      And People Wonder Why These manufacturers Are Continuously Loosing Their Market Share In The Competitive World Of Automotive Engineering

      (Nm to Lb-Ft Conversion // 1Nm * 0.7376)
      • 8 Years Ago
      I agree. Put a smaller straight 6 Cummins in a 1500 4x4, say 4.5L or so. Call it the Man's Edition . . . they'd sell like crazy. Have a sport package where you can get a stack. I'd buy it.
      • 8 Years Ago
      Put a diesel in a 1/2 ton and I'll get excited enough to buy one.
      • 8 Years Ago
      Beautiful. Dodge keeps upping the bar
      • 8 Years Ago
      • 8 Years Ago
      How much does this engine weigh?
      Why did DCX decide to couple this diesel with two different automatics? PTO ability?
      68RFE-3.231, 1.837, 1.41, 1, 0.816, 0.625, R 4.444
      Chassi cabs AS68RC-3.74, 1.96, 1.34, 1, 0.77, 0.63, R 3.54.
      The G56 manual has nice ratio coverage 8:1 & nice gearing when you are not towing (not launching in 1st)
      5.94, 3.28, 1.98, 1.3, 1, 0.74 R5.42 and is available with the 5.7 V8 instead of chrysler's 545RFE 4.5:1 ratio spread.
      • 8 Years Ago
      I know this is a different type of diesel, but the Audi V12 TDI makes more power and torque with better fuel efficiency and definately less weight.
      William Eyre
      • 7 Years Ago
      I BOUGHT A NEW DODGE 2500 WITH THE 6.7 AND HAVE BEEN BACK TO SERVICE SEVRAL TIMES WITH PROBLEMS.
      AFTER OWNING SEVERAL DODGE DIESLES OVER THE YEARS AND HAVING NO PROBLEMS WITH THE 5.9 MY ADVICE TO ANYONE CONSIDERING THE NEW 6.7 IS JUST DON'T DO IT!!!
      • 8 Years Ago
      I gotta get me one of these, but when is Dodge going to wake up and put a diesel in a 1500?
      • 8 Years Ago
      "The engine also features an optional exhaust brake function that improves braking under heavy towing situations, a common feature of big rigs and large motor coaches."

      Does this mean we'll have to put up with 'jake braking' Rams in non-highway situation? I sure hope not.
      • 8 Years Ago
      In the comment #9 I make a mistake, it should be 350hp and 650ft-lbs. please take note.
      • 8 Years Ago
      The newest HD deisel truck I've ridden in is a 99 F-350 (which sounds sweet imo), so does anyone know if these new deisels are gonna have to be quieted down for the mainstream, or if they'll still sound like a real deisel truck?
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