Remapping the Alpina B5 (2005-2010), 4.4 V8 Bi-Turbo 507HP.
On the Alpina B5 (2005-2010), the 4.4 V8 Bi-Turbo 507HP responds to remapping mainly through extra BHP, broadening the usable rev range, with power up 18.3% to 600bhp and torque following at a gentler 14.3% to 800Nm.
Turbocharged petrol engines have plenty of scope for a Stage 1 remap, and this impressive improvement is best felt through sharper throttle response across the rev range. These figures apply to 2005-2010 models.
Typical remap gains for the B5 4.4 V8 Bi-Turbo 507HP
Standard vs Remapped
Standard vs Remapped
- Power: 507bhp standard, 600bhp after a Stage 1 remap.
- Torque: 700Nm standard, 800Nm after a Stage 1 remap.
- This is a power-led gain: BHP increases by more than torque, widening the usable power band rather than boosting low-end pull.
- This is a turbocharged engine, which typically means further headroom exists beyond Stage 1 if hardware is upgraded.
- As a petrol engine, the practical benefit is mainly felt as sharper throttle response and a broader power band.
- These figures apply specifically to 2005-2010 models.
- These are Stage 1 figures only, achieved without any hardware changes.
Questions about remapping your B5 4.4 V8 Bi-Turbo 507HP
How much power and torque does a Stage 1 remap add to the Alpina B5 (2005-2010) 4.4 V8 Bi-Turbo 507HP?
A Stage 1 remap typically takes the Alpina B5 (2005-2010) 4.4 V8 Bi-Turbo 507HP from 507bhp to around 600bhp, and torque from 700Nm to around 800Nm. This is a impressive gain achieved entirely through software, with no hardware changes required.
Is the Alpina B5 (2005-2010) 4.4 V8 Bi-Turbo 507HP a good candidate for remapping?
Generally, yes: as a turbocharged engine it has the headroom to respond well to a quality remap, and the impressive gain shown here reflects that. The main caveats are condition, not the engine itself, a healthy service history, no outstanding fault codes, and (for diesels) a clear DPF and EGR are what actually determine whether this particular car is ready for a remap.
Will remapping affect the warranty on my Alpina B5 (2005-2010)?
A manufacturer can only void the parts of a warranty that the remap directly affects, not the entire vehicle, under the Consumer Rights Act and EU Block Exemption principles. In practice, on a Alpina B5 (2005-2010) 4.4 V8 Bi-Turbo 507HP this usually means engine and transmission-related claims are the ones worth discussing with a reputable tuner before booking.
What should I check before booking a remap for my Alpina B5 (2005-2010) 4.4 V8 Bi-Turbo 507HP?
Before booking, confirm the tuner uses a custom or bespoke file rather than a generic off-the-shelf map, ask whether they do a pre-remap health check, and check service history and mileage on your specific Alpina B5 (2005-2010).
What's the difference between a Stage 1 and Stage 2 remap for the 4.4 V8 Bi-Turbo 507HP?
Stage 1 is software-only and is what the figures on this page reflect. Stage 2 builds on that, but on a turbocharged engine like this, Stage 2 usually adds further gains but requires supporting hardware such as an upgraded intake or exhaust, so it is a separate conversation with a tuner rather than an automatic next step.
Will remapping my Alpina B5 (2005-2010) affect my insurance?
Yes, always, a remap is a modification and must be declared to your insurer regardless of size. Given this impressive gain on the 4.4 V8 Bi-Turbo 507HP, expect a likely premium increase, and it is worth getting a quote from a specialist modified-vehicle insurer before booking the remap itself.