Mercury Zephyr Engines by Year

The Zephyr was Mercury's version of the Fox-body Ford Fairmont, sold for 1978–1983 with the same engines.

Pick a year to see every engine offered that model year, with its code, rated horsepower and the trims it came in. Each engine links to its full specs.

Jump to a year

Fox (1978–1983): 1978 · 1979 · 1980 · 1981 · 1982 · 1983

Fox (1978–1983)

1978 Zephyr engines

Engine	Rated	Offered in
2.3L / 140 inline-four	88 hp net	All (standard)
3.3L / 200 inline-six	85 hp net	All (optional; early wagon standard)
5.0L / 302 V8	139 hp net	All (optional)

1979 Zephyr engines

Engine	Rated	Offered in
2.3L / 140 inline-four	88 hp net	All (standard)
3.3L / 200 inline-six	85 hp net	All (optional)
5.0L / 302 V8	—	All (optional)

1980 Zephyr engines

Engine	Rated	Offered in
2.3L / 140 inline-four turbo	—	Sedans and Z-7 (optional, automatic only)
2.3L / 140 inline-four	88 hp net	All (standard)
3.3L / 200 inline-six	—	All (optional)
4.2L / 255 V8	—	All (optional, automatic only)

1981 Zephyr engines

Engine	Rated	Offered in
2.3L / 140 inline-four	88 hp net	All (standard)
3.3L / 200 inline-six	—	All (optional)
4.2L / 255 V8	115 hp net	All (optional, automatic)

1982 Zephyr engines

Engine	Rated	Offered in
2.3L / 140 inline-four	86 hp net	All (standard)
3.3L / 200 inline-six	—	All (optional)

1983 Zephyr engines

Engine	Rated	Offered in
2.3L / 140 inline-four	—	All (standard)
3.3L / 200 inline-six	—	All (optional)

Working on one of these engines?

• Engine displacement from bore and stroke
• Static and dynamic compression ratio
• Which camshaft for your build
• What size carburetor
• Horsepower to torque at any RPM
• Torque converter stall speed

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