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Ford Mazda KL-DE DOHC 24v V6 specs: 153 ci (2.5L) 6-cylinder, 3.327 x 2.921 in (84.5 x 74.2 mm) bore and stroke, 9.2:1 compression. Rated 164 hp, 1993–1997.
The Ford Mazda KL-DE DOHC 24v V6 is oversquare — the 3.3268" bore exceeds the 2.9213" stroke by 13.9% — a layout that favors airflow and RPM over leverage at the crank. The 2.9213" stroke does not reach 4,000 ft/min of mean piston speed until about 8,200 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 25.5 ci (418 cc).
9.2:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 3 engines in the Ford 153ci family, all of them 153 ci — the differences between them are in compression, heads and rating, not displacement. 5 factory variants share these dimensions, rated at 164 hp across 1993–1997.
| Displacement | 153 ci / 2.5 L |
|---|---|
| Bore | 3.3268" |
| Stroke | 2.9213" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 9.2:1 * |
| Bore/stroke ratio | 1.139 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 164 hp |
| Years | 1993–1997 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 1994 | net | 164 @ 5600 | 160 lb-ft @ 4000 | — |
Factory specification sheet.
| Bore/stroke character | 1.139 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,921 ft/min — conservative for a street engine |
| Displacement per cylinder | 25.5 ci |
| Static compression | 9.2:1 — low by modern standards, generally happy on regular pump fuel |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1993 | 164 hp | Mazda KL-DE DOHC 24v V6 |
| 1994 | 164 hp | Mazda KL-DE DOHC 24v V6 |
| 1995 | 164 hp | Mazda KL-DE DOHC 24v V6 |
| 1996 | 164 hp | Mazda KL-DE DOHC 24v V6 |
| 1997 | 164 hp | Mazda KL-DE DOHC 24v V6 |
1 factory vehicle, 1993–1997. Each year opens that model's engine table.