The big news for the Navigator comes under the hood. Gone is the 5.4-liter Triton V8 of the old model. In its place sits the familiar 3.5-liter EcoBoost V6. Lincoln is touting at least 370 horsepower and 430 pound-feet of torque, making this the most powerful version of the twin-turbo EcoBoost six-cylinder we've seen. For comparison, the current Ford F-150 EcoBoost is quoted at 365 hp and 420 lb-ft, while the new Escalade's 6.2-liter V8 promises 420 hp and 460 lb-ft of torque.