Jeep Grand Cherokee
The Jeep® brand unveiled today the 2008 Jeep Grand Cherokee that features an all-new 4.7-liter V-8 engine that delivers a 30 percent increase in horsepower, a 10 percent increase in torque and improved fuel economy compared with the engine it replaces.
The 2008 Jeep Grand Cherokee also offers a refreshed interior and exterior design and a host of innovative premium amenities, including one not found on other full-size sport-utility vehicles (SUV) on the road today — SIRIUS Backseat TV™. The vehicle will arrive at Jeep dealerships starting this fall.
The 2008 Jeep Grand Cherokee is the only vehicle with a choice of five engine offerings. The award-winning 3.0-liter common rail diesel V-6 engine is now available on Jeep Grand Cherokee Limited and Overland. The 3.7-liter V-6 engine is standard on Jeep Grand Cherokee Laredo. The all-new 4.7-liter V-8 engine is standard on Jeep Grand Cherokee Limited. And the 5.7-liter V-8 HEMI® engine is available on Jeep Grand Cherokee Limited, standard on Overland.
The new 4.7-liter V-8 incorporates two spark plugs per cylinder (the only Chrysler Group engine to do so, other than the 5.7-liter HEMI), increased compression ratio, improved cylinder-head port flow and a new combustion system. The result is 305 horsepower (227kW), a 30 percent increase, and 334 lb.-ft. of torque (453 N•m), a 10 percent increase over the previous 4.7-liter V-8 engine. And, like the engine it replaces, the new 4.7-liter V-8 engine is flex-fuel capable, which gives customers the ability to use up to an 85 percent concentration of ethanol (E85) to fuel their vehicles.
Improvements in the new 4.7-liter V-8 result from significant revisions to the induction system, a lightweight piston/rod assembly and reduced accessory drive noise through lower accessory drive speed. Engine smoothness at idle is enhanced with a new cam design, two spark plugs per cylinder and a valve-lash adjuster system. The new 4.7-liter V-8 also is equipped with electronic throttle control.
Source: Jeep press