More Power and Outstanding Manners Define Chrysler Group’s New 4.0-liter V-6
The leading goals guiding the development of the new Chrysler Group 4.0-liter SOHC V-6 were impressive low-rpm torque and extremely smooth and quiet operation.
“When we decided to create a more powerful V-6 for Chrysler Group vehicles, we invested in building on the dependable 3.5-liter V-6,” said Bob Lee, Vice President, Chrysler Group Powertrain. “The new 4.0-liter V-6 delivers more power than any naturally aspirated V-6 engine in our vehicles, and does so with world-class smoothness and refinement.”
The new engine has impressive low-rpm torque that will give customers very good engine response around town and provide the power they expect from a world-class V-6. The 4.0-liter V-6 produces 255 hp @ 6,000 rpm and 265 lb-ft of torque @ 4,200 rpm. The engine produced 15 more lb-ft of torque at peak power rpm, and as much as 35 lb-ft more torque throughout the power curve.
Specific changes from the 3.5-liter engine for improved power include:
Specific changes from the 3.5-liter engine for decreased NVH include:
- The 4.0-liter is the most powerful naturally aspirated V-6 in Chrysler Group’s lineup - 255 hp and 265 lb-ft of torque
- Engine noise, vibration and harshness are greatly reduced for a refined driving experience
- The 4.0-liter will be available in the 2007 Chrysler Pacifica and Dodge Nitro
The leading goals guiding the development of the new Chrysler Group 4.0-liter SOHC V-6 were impressive low-rpm torque and extremely smooth and quiet operation.
“When we decided to create a more powerful V-6 for Chrysler Group vehicles, we invested in building on the dependable 3.5-liter V-6,” said Bob Lee, Vice President, Chrysler Group Powertrain. “The new 4.0-liter V-6 delivers more power than any naturally aspirated V-6 engine in our vehicles, and does so with world-class smoothness and refinement.”
The new engine has impressive low-rpm torque that will give customers very good engine response around town and provide the power they expect from a world-class V-6. The 4.0-liter V-6 produces 255 hp @ 6,000 rpm and 265 lb-ft of torque @ 4,200 rpm. The engine produced 15 more lb-ft of torque at peak power rpm, and as much as 35 lb-ft more torque throughout the power curve.
Specific changes from the 3.5-liter engine for improved power include:
- Crankshaft stroke increased from 2.47 in. (81 mm) to 2.78 in. (91mm)
- Displacement changed from 214.7 cu. in. (3.518 liters) to 241.2 cu. in. (3.952 liters)
- New camshaft profile featuring higher lift and revised timing events
- New upper intake manifold with improved flow
- Compression ratio raised from 10.0:1 to 10.2:1
Specific changes from the 3.5-liter engine for decreased NVH include:
- Increased main-bearing width and diameter
- Tighter crankshaft balance spec
- Select-fit rod bearings
- Reduced reciprocating mass piston assemblies
- Added ribbing to the sides of the engine block
- Increased pan-rail thickness on block
- Direct-mount oil pan to transmission bell housing
- Thermoplastic valve cover
- New "low rumble" intake manifold
- Intake lobes splayed
- Equal length exhaust