4.4T - 634ch Tuning
Alpina B5 GT — Detailed power and torque gains by stage.
Gains by stage(4)
Power
634 hp
Torque
850 Nm
essence
Power
634→700ch
+66 ch
+10%
Torque
850→900Nm
+50 Nm
+6%
OriginalTuned
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Everything about 4.4T - 634ch tuning
Tuning the 4.4T - 634ch found in the Alpina B5 GT is one of the most popular performance upgrades. This engine offers excellent potential for power and torque gains.
On ChiptuneMAP, find verified gain data for each stage, compare tuner prices and find the ideal professional for your project.
Gains summary by stage
On the Alpina B5 GT 4.4T - 634ch, tuning delivers up to +136 hp and +140 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 634 → 700 hp | 850 → 900 Nm | — |
| Stage 2 | 634 → 770 hp | 850 → 990 Nm | — |
| E85 Flexfuel | 634 → 634 hp | 850 → 850 Nm | — |
| E85+ | 634 → 700 hp | 850 → 900 Nm | — |
Frequently asked questions
What gains can I expect from tuning the 4.4T - 634ch?
Tuning the 4.4T - 634ch (Alpina B5 GT) delivers significant power and torque gains depending on the chosen stage. Stage 1, with no hardware modifications, offers the best gain-to-reliability ratio.
Is tuning reliable on the 4.4T - 634ch?
Yes, the 4.4T - 634ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a certified tuner with maps tailored to your engine.
How much does Alpina B5 GT tuning cost?
Prices vary by stage and tuner. Check our directory to compare rates from professionals near you.
Should I get a tuning box or an ECU remap?
ECU remapping (modifying the engine control unit map) delivers better results and integration than a plug-in tuning box. It's customized for each engine.
How do I find a tuner for my Alpina B5 GT?
Use the ChiptuneMAP directory to find a certified tuner near you. Compare reviews, prices and specialties.