The 2015 Ford Expedition’s main engine is the 3.5-liter EcoBoost V6. An older 5.4-liter V8 was available on certain trims as an alternative.
Engine options for the 2015 Expedition
Below is a concise look at the powerplants offered for the 2015 Expedition, including what they are and how they typically perform.
- 3.5-liter EcoBoost V6 twin-turbo — Gasoline engine delivering about 365 horsepower and around 420 lb-ft of torque. This turbocharged V6 is paired with Ford’s automatic transmission and is the flagship option for strong towing performance and everyday usability.
- 5.4-liter V8 gasoline — An optional traditional V8 on select trims. This engine generally produces roughly 310–320 horsepower and about 360–385 lb-ft of torque, depending on the exact configuration and model year, and was offered to buyers seeking the conventional V8 setup.
For most buyers, the 3.5-liter EcoBoost V6 offers the best balance of power, efficiency, and towing capability, while the 5.4-liter V8 serves buyers who prefer the traditional V8 character or certain legacy configurations.
Summary
The 2015 Expedition primarily relies on Ford’s 3.5-liter EcoBoost V6 for modern performance, with the 5.4-liter V8 available as a secondary option on certain trims. This combination reflects Ford’s shift toward turbocharged six-cylinder power while still offering a conventional V8 for traditional buyers.