7.3L IDI vs 12v Cummins vs 6.5L GM

 

 

 

7.3L IDI International

5.9L Cummins 12v

6.5L General Motors

Production Years:

1988 - 1994

1989 - 1998

1992 - 2001

Manufacturer:

International

Cummins

Detroit Diesel

Block/Head Material:

Iron/Iron

Iron/Iron

Iron/Iron

Configuration:

V-8

Inline 6

V-8

Displacement:

7.3 liters , 444 cubic inches

5.9 liters, 359 cubic inches

6.5 liters, 395 cubic inches

Compression Ratio:

21.5:1

17.0:1

18.0:1 -21.3:1 depending on year & application

Bore x Stroke:

4.11 x 4.18 inches

4.02 x 4.72 inches

4.06 x 3.82 inches

Injection System:

Indirect injection (IDI)

Direct Injection

Indirect injection (IDI)

Aspiration:

Naturally aspirated, optional turbocharger introduced in 1993

Holset Turbocharger

Naturally aspirated & turbocharged versions available

Valvetrain:

Over head valve, 2 valves per cylinder

Over head valve, 2 valves per cylinder

Over head valve, 2 valves per cylinder

Peak Horsepower:

185 horsepower @ 3,000 RPM
190 horsepower @ 3,000 RPM w/ turbocharger

215 horsepower @ 2,500 RPM (1998)

215 horsepower @ 3,400 RPM (turbocharged)

Peak Torque:

360 lb-ft @ 1,400 RPM
388 lb-ft @ 1,400 RPM w/ turbocharger

440 lb-ft. @ 1,600 RPM (1998)

440 lb-ft @ 1,800 RPM (turbocharged)

Notes:

• Based on a bored out version of the 6.9L IDI
• Has very little in common with the 7.3L Power Stroke
• A factory turbocharged version was introduced for the 1993 model year.

• Dodge's first diesel and the market's first inline 6
• Introduced with 400 lb-ft of torque

• The turbocharged 6.5L managed to match the 12v Cummins in torque, but has earned nowhere near the its reputation
• Based on the design of the 6.2L, available turbocharged or naturally aspirated