Already brutally fast in standard form, the BMW M5 G90 has been taken a step further by G-Power, which has fitted its GP-1000 programme to push output well beyond sensible territory. For fans of muscular executive saloons, the appeal is obvious: more power, more torque and a drivetrain that appears to have been set free from its factory restraints.
The M5 G90 did not need much. G-Power applied plenty anyway.
From a passion-and-collectables point of view, the brief is straightforward enough: take a BMW M5 G90 that is already formidable and move it into territory that is far less civilised. In standard form, the hybrid saloon’s 4.4-litre twin-turbo V8 is quoted at 717 ch and 1 000 Nm, with 0 to 100 km/h dispatched in 3.4 seconds. Those are hefty numbers, but they still leave room for a tuner willing to tackle an especially serious technical job.
G-Power’s message is simple enough. The modern M5 is already a machine with very few obvious weaknesses, but it can still be taken further. And in the world of modified German saloons, the mere decision to go further tells you a great deal about the culture around these cars. This is no cosmetic tweak; it is a proper shift in intent.
The GP-1000 package lifts output into four figures
With the GP-1000 programme, the BMW M5 G90 rises to 1 000 PS, or 986 ch, while torque climbs to 1 250 Nm. In plain English, that takes it out of the “very fast” category and into the sort of numbers that demand attention before you have even turned a wheel. On paper, it is the kind of specification that turns a grand touring saloon into something much more like a rolling statement of intent.
G-Power has not simply stopped at an ECU adjustment. The tuner says the package includes revised turbos, larger intercoolers, high-performance downpipes, a freer-flowing exhaust system and reworked intake hardware. In other words, every part of the V8’s breathing and boosting arrangement has been revisited. The idea is familiar, but the scale of the mechanical intervention is anything but modest.
The real gain is how the engine is allowed to breathe
The point of the GP-1000 is not only the headline figure. It is the way the whole set-up is meant to work together: more air, less restriction and engine management recalibrated to take advantage of the extra headroom. G-Power claims crisper throttle response, a stronger mid-range and better efficiency under load. That is exactly what you want from a serious tuning package: not just a bigger number for the brochure, but a sharper car in the real world.
On an M5, that approach makes a great deal of sense. BMW’s saloon is already designed to combine motorway comfort, long-distance usability and sudden violence when required. Add a vast torque reserve and, in theory, you strengthen the very traits that make the car appealing in the first place: effortless overtaking, hard-hitting acceleration and the slightly unnerving impression that distance has become optional. Sensible? Not remotely. Effective? Very possibly.
Top speed is left vague, but the intent is clear
G-Power has not published an official performance figure, which is almost the most intriguing part of the story. The standard BMW M5 is quoted at 155 mph, or around 250 km/h, rising to 190 mph with the M Driver’s Package. The GP-1000 is described as having an unlocked top speed, but no exact number is given. That leaves some mystery, while also reminding us that at this level the limiting factors are as much technical and legal as they are mechanical.
So the project should be read as a demonstration of capability rather than an official certification exercise. G-Power is not promising another neat factory-style data point; it is showing what the G90 platform can take when it is handed to a specialist prepared to go well beyond the usual boundaries. That, really, is the attraction of tuning at this level: a familiar car remade into something much less reasonable than the one that left Munich.
A high-speed saloon, but not one built to stay discreet
The BMW M5 has always balanced two personalities: the comfort of a large executive car and the pace of a serious performance machine. G-Power tilts that balance decisively towards the latter. Exterior drama is not the main story here; it is the hardware underneath that matters. And it matters a great deal. This is a long way from the sort of styling package that relies on wheels and badges to make the point.
That said, owners should not underestimate what a move like this means in practice. More power usually brings greater demands elsewhere, even if the source material does not detail any chassis changes or extra reinforcement. In other words, the car gains muscle, but the question becomes how, where and how often that strength is used. Few people genuinely need 986 ch in a four-door saloon; fewer still need it for the school run.
GP-1000 is a showcase for serious Bavarian saloon fans
What the GP-1000 really shows is that the BMW M5 G90 remains a compelling base for tuners who want to stretch a proven formula without changing the car’s basic shape. Nothing here is revolutionary, but every ingredient has been turned up a notch. And when a production saloon is already knocking on the door of supercar pace in a straight line, the temptation to keep escalating becomes almost a hobby in itself.
For enthusiasts, the appeal is obvious. For everyone else, it is more of a mechanical curiosity than a sensible recommendation. This M5 is not answering a rational need; it is making a statement. In that sense, G-Power has done exactly what a serious tuner should do: remind us that for some owners, “enough” is just another word for “not yet”.
What to take away from G-Power’s BMW M5 G90
- The standard BMW M5 G90 already delivers 717 ch and 1 000 Nm.
- The GP-1000 package raises output to 1 000 PS, or 986 ch.
- Torque increases to 1 250 Nm, putting it in a different league for straight-line response.
- The package includes revised ECU calibration, turbos, intercoolers, downpipes, exhaust and intake.
- G-Power says the top speed is unlocked, but gives no exact figure.
- It is aimed squarely at enthusiasts of heavily tuned executive saloons, not buyers after subtlety.
