Unveiling the Next-Gen BMW M5: Hybrid V8 and Heftier Build

The BMW M5 G90 is set to impress with a plug-in hybrid V8, boasting 718 hp, despite concerns over its significant weight increase to 5,368 pounds.

No matter the type—be it sedans, coupes, hatchbacks, or SUVs—the trend is consistent: new models tend to be larger and heavier than their predecessors. Often, manufacturers boost power to offset this increased heft. The upcoming BMW M5 is a prime example, according to a reliable source within the BMW community.

A member of the Bimmer Post forums, known for accurate BMW predictions, has unveiled some enticing details. The next-gen M5, codenamed G90, is expected to feature a plug-in hybrid V8 powertrain borrowed from the XM model. Rumor has it that the combined output will reach 718 hp, with the 4.4-liter twin-turbo V8 contributing 577 hp and 750 Nm (553 lb-ft), and the electric motor adding 194 hp and 280 Nm (207 lb-ft).

However, there’s a concerning rumor about the new M5’s weight—it’s reportedly a hefty 2,435 kilograms (5,368 pounds), matching the Porsche Panamera Turbo E-Hybrid. This would make it 453 kg (998 lbs) heavier than the previous model, the F90.

The choice of a hybrid system over a standalone V8 likely stems from the need to meet strict emission standards, particularly in the European Union. While a plug-in hybrid can be efficient with regular battery charging, it can lead to increased fuel consumption if not utilized properly, due to the extra weight.

The upcoming M5 is believed to use a lithium-ion battery pack with 18.6 kWh of usable energy, less than the XM’s 25.7 kWh. Despite concerns about its weight, the M5 is expected to be 606 lbs (275 kg) lighter than the XM. There’s also talk of a wagon variant, the M5 Touring, codenamed G99, which might be slightly heavier.

The new M5 is projected to be 1.4 inches (36 mm) longer and 2.7 inches (70 mm) wider than the standard 5 Series Sedan, with an extended wheelbase due to revised suspension geometry. The insider also mentioned that the front will have 20-inch wheels with 285/40/20 tires and the rear 21-inch wheels with 295/35/21 tires.

An update expected in early 2027 is said to introduce the Panoramic Vision, a new wide head-up display. The M5 Sedan’s production is slated to start in July, with the wagon following in November. The sedan is planned to be produced until February 2031, with its debut expected soon, although the wagon might be unveiled later in the year.