Johannesburg - With 441 killer-watts waiting to be unleashed, the latest BMW M5 is not exactly underpowered in our book. But just for those who like living life at the extreme of extremes, local tuner RG Motorsport has found another ‘100 horses’ in BMW’s 4.4-litre twin-turbo V8.
That’s 74kW in the metric speak that we’re accustomed to, bringing the total tally to 515kW at the flywheel, while maximum torque rises from 750Nm to 907Nm. In fact at 6000 revs, there’s still 735Nm on tap, almost as much as the standard engine’s maximum, achieved at 4000rpm.
So how fast is it now?
RGM has not run the car against a Vbox as yet, so no official acceleration numbers. But since the almost-two-tonne sledgehammer of a saloon can already hit 100km/h from standstill in 3.4 seconds in standard form, you could probably shave a few tenths off that.
How did RG achieve these gains?