* 2.7L 4-cylinder engine: This engine produced 187 horsepower and 186 lb-ft of torque.
* 3.5L V6 engine: This engine produced 266 horsepower and 245 lb-ft of torque.
So, depending on the specific trim level and configuration of the 2008 Highlander you are interested in, it could have either a 2.7L 4-cylinder or a 3.5L V6 engine.