1986 Mercury Marquis (2.3L 4-cyl) MPG & Specs
Quick answer
The 1986 Mercury Marquis gets an EPA-estimated 18/23 MPG (city/highway) and 20 MPG combined, with an estimated $3,100/year fuel cost and 444.35 g/mi CO₂. Engine: 2.3 L 4-cyl.
The 1986 Mercury Marquis with the 2.3-liter 4-cylinder regular gasoline engine returns an EPA-estimated 18 MPG in the city and 23 MPG on the highway, for a combined 20 MPG. This page summarizes the official EPA fuel-economy and emissions data for this configuration.
| Engine | 2.3 L 4-cyl |
| Transmission | Automatic 3-spd |
| Drive | Rear-Wheel Drive |
| Fuel type | Regular Gasoline |
| Vehicle class | Midsize Cars |
| MPG — city | 18 |
| MPG — highway | 23 |
| MPG — combined | 20 |
| Annual fuel cost* | $3,100 |
| CO₂ tailpipe | 444.35 g/mi |
| EPA GHG score | — |
How efficient is it?
With a combined 20 MPG, the 1986 Mercury Marquis sits in the moderate range for fuel economy. That is roughly 22% thirstier than the typical Midsize Cars of its era (26 MPG class average) — expect higher fuel bills than class-average alternatives.
Fuel economy and running costs
At about $3,100 per year in fuel (EPA estimate, 15,000 mi/yr), fuel is a major part of the cost of owning the 1986 Mercury Marquis. Over five years that is roughly $15,500 at today's prices — before insurance, maintenance, and depreciation.
Emissions
The 1986 Mercury Marquis emits approximately 444.35 grams of CO₂ per mile at the tailpipe. Lower emissions generally track higher fuel economy.
How to read these numbers
EPA figures come from standardized laboratory test cycles and are the same estimates shown on the vehicle's window sticker. Your real-world mileage depends on driving style, conditions, fuel grade, and maintenance. Use combined MPG and annual fuel cost to compare vehicles fairly.