The specifications of the GM 4.8 liter V8 Vortec L20 small block engine include a displacement of approximately 4807 cubic centimeters and a compression ratio of 8.8 to one. It uses a sequential fuel injection system and has a maximum engine speed of 6,000 rotations per minute.
The 4.8 lit Vortec engine can generate up to 285 horsepower at 5,400 rotations per minute and 295 pounds feet of torque at 4,600 rotations per minute. The main engine block features cast-iron construction and a cast-aluminium cylinder head. Other features of the engine include electronic throttle control, variable valve timing and E85 Flex Fuel.