Mercury Grand Marquis 2003 - 2012 4.6 V8 239hp
Real standard and upgraded performance figures for the 4.6 V8 239hp engine in the Mercury Grand Marquis 2003 - 2012.
This page covers the 4.6 V8 239hp as fitted to the Mercury Grand Marquis 2003 - 2012 — the figures below reflect that specific engine, not the model as a whole.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 239 | 382 |
| Stage 1 | 260 | 400 |
| Stage 2 | 270 | 409 |
- Make
- Mercury
- Model
- Grand Marquis
- Generation
- 2003 - 2012
- Engine
- 4.6 V8 239hp
- Fuel type
- petrol
Frequently asked questions
Is Stage 1 tuning safe for the Mercury Grand Marquis 2003 - 2012 4.6 V8 239hp?
Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.
How much more power does the 4.6 V8 239hp make after tuning?
Standard output is 239 HP / 382 Nm; Stage 1 on this engine typically reaches 260 HP / 400 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Mercury Grand Marquis 2003 - 2012 4.6 V8 239hp remap take?
Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.
Can the 4.6 V8 239hp be reverted to its original file?
Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.