GM’s new 2.7-liter four-cylinder looks like an impressive engine. It produces 310 hp and 348 lb-ft of torque and can achieve better torque and fuel economy than the V6 model. The Tripower name now refers to three fuel-saving technologies in the engine. The first is the ability to shut down two cylinders at cruising speeds to save fuel. The other two technologies, active thermal management, and intake valve lift control keep the engine at the optimum operating temperature and improve fuel economy. It may not be a V8, but GM’s new Tripower technology is far more advanced than its predecessor.