The new BMW M5 engine size drops from V10 to V8.
The new BMW M5 engine size drops from V10 to V8.

BMW unveils M5 after sneak peek

THE M5 has been unleashed.

Official details of BMW's new M5 super sedan have been released, after images and vital details were leaked online a week ahead of their scheduled debut.

The new M5 will be powered by the same 4.4-litre twin-turbocharged V8 engine as the brand's X5 and X6 M models, following a trend from manufacturers to downsize their engines in order to save fuel.

Despite the smaller engine (the existing M5 was fitted with a 5.0-litre V10 powerplant) the new super sedan will produce a few extra kilowatts over BMW's M-badged SUV models – 412kW compared to 408kW – about 10% more than its predecessor (373kW).

Torque output from the new 4.4-litre twin-turbo engine doesn't change from the X5 and X6 M models at 680Nm, representing a jump of 30% over the old V10 engine.

The M5's engine sends its power to the rear wheels via a seven-speed dual-clutch automatic, with a manual option a slight chance of making an appearance.

All that power apparently makes for quite a show, with online reports suggesting the M5 will complete the 0-100kmh dash in just 4.4 seconds, with the 0-200kmh sprint taking just 13 seconds. The top speed is limited at 250kmh, but if you plan to do some track days you can choose the M-Drivers Package, which boosts the top speed ability to 305kmh.

The other benefit of the new, more efficient engine is a 30% drop in fuel consumption. The new model uses a claimed 9.9 litres per 100 kilometres, where the old V10 version used 13.0L/100km.

The styling of the new M5 doesn't stray far from that of the concept version unveiled at the Shanghai motor show.

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