The 1991 Ford Explorer was offered with two engine options: a 2.9-liter V6 and a 4.0-liter V6. This article explains what those engines are and how they were used in the model year.
In practice, buyers could choose between the smaller, more economical 2.9L V6 for everyday driving, and the larger 4.0L V6 for greater power and towing capability. Both engines were typically paired with a four-speed automatic transmission, and 4x4 versions were common in many trims.
Engine options for the 1991 Explorer
The Explorer lineup in 1991 offered two V6 powerplants to suit different needs and budgets. The following list summarizes the two engines available that year:
- 2.9-liter V6 – the base engine, a compact V6 used on lower- to mid-level trims
- 4.0-liter V6 – the larger, more powerful option chosen for better towing and off-road capability
Both engines contributed to the Explorer’s mix of everyday practicality and rugged capability, with the 4.0L providing noticeably more torque for heavier loads and rougher terrain.
Details by engine
2.9-liter V6
The 2.9L V6 served as the smaller option in the 1991 Explorer lineup. It delivered adequate performance for daily driving and light hauling, and was popular for buyers prioritizing fuel economy and lower operating costs. This engine was typically paired with a four-speed automatic transmission, with four-wheel-drive available on appropriate trim levels.
4.0-liter V6
The 4.0L V6 offered more power and torque, making it the preferred choice for buyers planning to tow trailers or tackle challenging terrain. It was widely used across mid- and higher-trim Explorers of the era and was also paired with an automatic transmission in most configurations. This engine improved overall capability without requiring a switch to a V8.
What this means for buyers in 1991
For the 1991 Ford Explorer, the engine choice primarily came down to balancing fuel economy against capability. The 2.9L V6 was suitable for everyday use, while the 4.0L V6 provided stronger performance for towing and off-road work. Understanding these options helps explain why buyers selected different Explorers based on their intended use.
Summary
The 1991 Ford Explorer offered two engine options: a 2.9-liter V6 for efficiency and daily driving, and a 4.0-liter V6 for stronger towing and off-road performance. Both were commonly paired with automatic transmissions, and 4x4 configurations were available on many trims, aligning with the model’s rugged, versatile design.