The 4.7-liter version was the first of this family, appearing in the 1999 Jeep Grand Cherokee. The displacement is 287 cubic inches (4698 cc) with a bore of 3.66 in (93 mm) and a stroke of 3.405 in (86.5 mm). It has a cast iron block and aluminum heads with two valves per cylinder. It uses chain-driven overhead camshafts, one in each head. It originally produced 235 hp (175 kW) and 295 lb·ft (400 N·m) of torque. The 4.7 L V8 is available with four speed and five speed automatic transmissions and a 5 speed manual transmission. A "High-Output" version of the 4.7 L PowerTech engine, producing 265 hp (198 kW) and 330 lb·ft (450 N·m) of torque, was introduced in 2002, first appearing in the Jeep Grand Cherokee Limited as an option and in the Jeep Grand Cherokee Overland as standard equipment.
This engine was discontinued after the 2007 model year, though the non high output 4.7L V8 engine continued to be available in all vehicles.[WIKI]
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