Next-generation M5 to feature twin-turbo V-8

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In a move that seems to echo efficiency discussions in boardrooms everywhere, Edmunds.com’s Inside Line has confirmed through BMW that the auto manufacturer will drop the existing V-10 engine in the M5 and replace it with a twin-turbocharged V-8.

This is the first time BMW will have reduced engine displacement in the M5; the first iteration featured a straight-six, while the E39 M5 was motivated by a 400-hp V-8. Currently, the rear-wheel drive über-car features a 5.0-liter V-10 that delivers 500 hp but just 17 mpg on average.

The smaller displacement engine and a new eight-speed dual-clutch transmission should help assuage concerns regarding CO2 output and fuel consumption. However, the new engine will reportedly produce closer to 600 horsepower, a number that indicates BMW is aiming to improve efficiency in its lineup while actually increasing power. We can’t imagine many buyers having a problem with that concept.

The newest M should be released as a 2012 model following an overall redesign for the 5 Series in 2011.

-- Alison Lakin

Lakin is a staff writer at DriverSide.com.

Photo: 2009 BMW M5, Photo Credit: Edmunds