Next gen BMW M5: Autocar has more details

Rumors | November 4th, 2009 by 8
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Ever since the news broke that the next generation BMW M5 will be powered for the first time by a turbocharged engine, many BMW fans, …

Ever since the news broke that the next generation BMW M5 will be powered for the first time by a turbocharged engine, many BMW fans, and not only, have posed THE question: why a turbo engine and not the almighty NA powerplant that made us all happy?

After a discussion with Albert Biermann, head of development at M Division, Autocar UK reports that the decision was influenced by BMW’s aggressive plans to cut fuel consumption as part of the EfficientDynamics programme.

“We’ve been forced to switch to an engine offering greater low-end torque than the naturally aspirated engine to ensure it can cope with the longer axle ratio,” Biermann said. “It’s the only real way we can balance achieving the environmental improvements we want while retaining similar levels of performance to today’s car.”

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Could this be a concern? Sure, but if all the past rumors come true, BMW’s use of new technology and even a KERS system will put the new M5 ahead of the current model, both in performance and fuel efficiency. Biermann estimates a 20% cut in CO2 emissions.

Since not all the details can be revealed way ahead of its launch time, the mystery around the engine used remains large. Based on our sources’ reports and what other magazines reported, a V8 twin-turbo engine is the powerplant of choice in the new F10 M5. Output? Unknown, but we expect higher than the 555 ponies outputted by the X5 M and X6 M.

Biermann gets into more details regarding the turbocharged vs. naturally aspirated powerplant. While the 500 horsepower from the current V10 comes at 7,750 rpm, the V8’s highest output should come before 6,000 rpm. But then we have the impressive torque coming from a turbocharged engine. Biermann indicates a 30% increase in torque, so that gives the new M5 around 500 lb-ft of torque at very low rpm.

The added power and V8 turbocharged engine requires additional cooling capacity and current test mules, seen in previous spy photos, are focusing on cooling solutions. The process is still at an early stage.

In the past, we reported that two gearboxes were being considered, an updated 8-speed dual-clutch gearbox (DCT) or a more advanced 8-speed SMG. Although we cannot confirm this at the moment, Autocar reports that the M5 will also get a new gearbox, a beefed-up version of the current M3’s 7-speed DCT. The gearbox was featured last week on the M5 “CSL” at the 25th anniversary event at Nurburgring.

Even though a hybrid model is being considered in the 5 Series line-up, the M5 will not be featuring any sort of hybrid system due to the extra weight would add to the car. Another significant change in the next M5, is the control-arm front suspensions that will replace the MacPherson Struts and at the rear. This will be a multi-link layout.

With a car growing in size, a new large engine, M5’s weight concerns are being addressed by using plenty of carbon fiber design elements. The newly unveiled wind tunnel in Munich will play an important role in the aerodynamics of the new M5. Autocar states that the car will get Active Aerodynamics, which blanks off parts of the grille and cooling intakes during warm-up and under light throttle load.

The F10 M5 will continue to feature different levels of ride comfort, leaving the choice to the driver.

Once again confirming some our previous reports on the new technology available in the next BMW M5, Biermann mentions a new, fully electric power steering that offers similar levels of response and feedback to today’s hydraulic set-up.

The F10 BMW M5 will launch a year after the regular 5 Series models and the 2011 Frankfurt Motor Show would be the perfect venue.

[Source: Autocar ]

8 responses to “Next gen BMW M5: Autocar has more details”

  1. Giom says:

    Sounds good! It will be a better M5 – now doubt about that!

  2. John Pham says:

    It will be a monster. Literally…a monster the other Germans should be afraid about. After all, the only problem with M is that they haven’t been quick on the straights. I think this answers it…

  3. Doug says:

    What’s an “axle ratio”?

    • Auday says:

      I think he meant the differential ration, i.e. the gears will be longer and to do that you need high torque distributed all over the engine RPM so that you could always be in the toque band without having to downshift …contrary to the current M cars with peaky engines and shorter gears where you should always shift to be in the right gear to get the push you need.

      So in a short version, he is saying that driving the new M5 will be as lame as driving an AMG car.

      • wazon says:

        Why do you have so critical attitude to M5 tt? It’s good advantage of twin-turbo technology that engine has max torgue in wider range of rev speed than n/a engines. I think that every driver of M5 tt will appreciate this feature sooner or later.

        BTW, what exactly do you mean by saying “as lame as AMG”?

  4. efoza says:

    Look for heaven sake face the facts. The X6M is now the best ever M car built. Just now wait for the the BMW 5 Series GT M which I am told will be out in 2011 too.

  5. Bryce says:

    If you look at the hood, it looks like the opening to access the engine bay won’t extend all the way to the headlights. I just saw that the same feature is used on the new camaro. Although, there doesn’t seem to be a hood “bulge” and I would expect to see some sort of detail on the hood since the current M3 uses so many.

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