Mazda FS-DE Specs: 83 x 92 mm (3.2677 x 3.6220 in), 118-140 hp

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Mazda FS-DE specs: 2.0L (122 ci) 4-cylinder, 83 x 92 mm (3.2677 x 3.6220 in) bore and stroke. Rated 118-140 hp, 1993–2003. Used in the Mazda 626.

The Mazda FS-DE is undersquare — the 3.622" stroke exceeds the 3.2677" bore by 9.8% — a layout that trades peak RPM for leverage and torque low in the range. The 3.622" stroke puts mean piston speed at 4,000 ft/min around 6,650 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 30.5 ci (500 cc).

It is one of 4 engines in the Mazda 122ci family, all of them 122 ci — the differences between them are in compression, heads and rating, not displacement. 13 factory variants share these dimensions, rated from 118 to 140 hp across 1993–2003.

Dimensions

Displacement	122 ci / 2 L
Bore	3.2677"
Stroke	3.622"
Cylinders	4
Configuration	I4
Compression ratio	9–9.1:1 (published figures vary)
Bore/stroke ratio	0.902

Construction

Fuel type	gas
Advertised HP	118–140 hp
Years	1993–2003

Factory ratings by year

Year	Version	HP @ rpm	Torque @ rpm	Comp.
1993	FS-DE net	118 @ 5500 *	127 lb-ft @ 4500 *	9:1 *
1998	FS-DE net	125 @ 5500 *	127 lb-ft @ 3000 *	9:1 *
2002	FS-DE net	130 @ 6000 *	135 lb-ft @ 4000 *	—

Factory specification sheet. * Not yet cross-verified.

What these numbers mean

Bore/stroke character	0.902 — undersquare — stroke exceeds bore, which favours low-end torque
Mean piston speed at 6,000 RPM	3,622 ft/min — in the range typical of performance street engines
Displacement per cylinder	30.5 ci

Run the numbers for this engine

Each link opens the calculator with this engine's specs already filled in.

• Displacement from bore and stroke (calculator)
• Static and dynamic compression ratio calculator
• Piston ring gap for this bore
• Piston speed at any RPM
• Horsepower to torque at any RPM
• What size carburetor (CFM calculator)

Variants sharing these dimensions (13)

These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.

Year	Advertised HP	Code
1993	118 hp	FS-DE
1994	118 hp	FS-DE
1995	118 hp	FS-DE
1996	—	FS-DE
1997	—	FS-DE
1998	125 hp	FS-DE
1999	125 hp	FS-DE
2000	130 hp	FS-DE
2001	—	FS-DE
2001	130 hp	FS-DE
2001	140 hp	FS-DE
2002	130 hp	FS-DE
2003	—	FS-DE

What cars have the FS-DE?

3 factory vehicles, 1993–2003. Each year opens that model's engine table.

• Mazda 626: 1993, 118 hp; 1994, 118 hp; 1995, 118 hp; 1996; 1997; 1998, 125 hp; 1999, 125 hp; 2000, 130 hp; 2001; 2002, 130 hp
• Mazda MX-6: 1993, 118 hp; 1994, 118 hp; 1995, 118 hp; 1996; 1997
• Mazda Protege: 2001, 130 hp; 2001, 140 hp; 2002, 130 hp; 2003

Similar engines

• Mazda RF diesel — 122 ci
• Mazda FET — 122 ci
• Mazda FS-DET — 122 ci
• Mazda MZR · 3.445" × 3.272" · 10:1 — 122 ci
• Mazda 20 LF — 122 ci
• Mazda MZR 2.0 — 122 ci
• Cadillac LTG — 122 ci
• Cadillac LTG — 122 ci

← All Mazda 122ci engines