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  #1  
Old 07-07-2008, 04:37 PM
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Arrow New BMW M5 to drop V10 in favor of turbo V8

BMW CEO Norbert Reithofer has revealed in the past that future BMW powertrains will be downsizedin an effort to improve fuel-efficiency and reduce emissions, and that even the hallowed M division could also be affected by the new wave of environmental consciousness sweeping the carmaker. BMW has always stood by the high-rev philosophy for delivering power from its M engines but that may be about to change.

Inside sources have revealed that the next-generation M5, due in 2011, will be powered by a high-performance twin-turbo V8 engine instead of a naturally aspirated V10. The source also revealed that initial tests of variations of the 400hp (298kW) turbocharged 4.4L V8 found in the X6 crossover is showing promising results, reports Automotive News.

Additionally, BMWs M engineers are also finding good results from the award-winning 3.0L straight-six turbo. It comes very close to a large-displacement, naturally aspirated engine, the source told reporters.

Prototypes of the current M5 have been seen sporting front-mount intercoolers and additional air-intakes, confirming that a high-performance turbocharged powertrain is being developed. And, while purists may scoff at the idea of a turbocharged M car, the decision by rivals to launch forced-induction competitors such as the new twin-turbo RS6 and upcoming SL Black-Series, which is expected to get a twin-turbo V12, may leave BMW with little choice.

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  #2  
Old 07-07-2008, 08:20 PM
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Saw that coming. Good news.

Thanks for the post.
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Old 07-07-2008, 11:02 PM
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I'm sorry, but wasn't an //M car all about squeezing the most power possible out of a small displacement NA motor? What's next, a Sport Automatic transmission in the new M cars? BMW seriously needs to get back to its old heritage and stop going mainstream just for the sake of good PR.

Downsize the normal motors all you want. I'm fine with a 2.3 litre I6 that produces 190PS or a 3.5 litre V8. But an M car is not about ecomentalism, good publicity, or compromises.
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Old 07-07-2008, 11:30 PM
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Quote:
Originally Posted by AzNMpower32
I'm sorry, but wasn't an //M car all about squeezing the most power possible out of a small displacement NA motor? What's next, a Sport Automatic transmission in the new M cars? BMW seriously needs to get back to its old heritage and stop going mainstream just for the sake of good PR.

Downsize the normal motors all you want. I'm fine with a 2.3 litre I6 that produces 190PS or a 3.5 litre V8. But an M car is not about ecomentalism, good publicity, or compromises.
And so it goes

Who ever defined an M car as being about small displacement? The same guy that moved the M5 up to 5 litres? If you want to use displacement as a criterial, then the M brand has been slowly dying since the 4 cylinder M3 bowed out.

I always figured M cars were about technology applied to a performance vehicle. You can define performance any way you want, and my definition is no more valid than anyone elses, but an M5 that gets 10 mpg is simply embarrasing, top speed and acceleration not withstanding. It is definitely a compromise, since you can't drive by too many fuel stations with the limited range of the current model.

And what the heck is an ecomentalist? The very use of the word defines the problem we are facing, when responsibility is rewarded with derision. I understand the concept you are expressing, but if you want to commit ecocide (at least that is a word with more than 750 hits on Google) why do you need to use a BMW M car to do it?

Rant over.
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Old 07-07-2008, 11:38 PM
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If BMW wants to stick with NA cars, then they need to focus on smaller cars and weight reduction. Seeing as the cars are getting bigger and heavier, FI seems like the only way to go with the extra weight if they want to compete with other cars on the market with huge horsepower and still maintain reasonable fuel economy.

I guess the times are changing and the M-cars are too. It does seem like BMW is getting farther and farther from the roots of the e30 M3 with every new generation. Maybe that is why a good example of the original M3 demands over $20k.
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Old 07-08-2008, 12:48 AM
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The whole point of a M-car is performance, when you buy something like that you don't even look at fuel economy, or at least I don't.
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Old 07-08-2008, 12:56 AM
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Cool

Quote:
Originally Posted by mrkbbd
The whole point of a M-car is performance, when you buy something like that you don't even look at fuel economy, or at least I don't.
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Old 07-08-2008, 01:09 AM
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Unfortunately M5 sales are effected due to fuel economy and some owners even sold their M5 as they did not like the V10 guzzling gas with 8-10mpg.
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Old 07-08-2008, 01:29 AM
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Variable Geomtery Turbos revolutionize what's possible in terms of output. Putting aside emissions and fuel economy, just from a performance pov, they'd be stupid not to switch to vgt engines. With vgt's they'll have the characteristics of a long stroke engine as well as short stroke. Power everywhere. Fewer cylinders means a lighter engine, less packaging constraints, lighter rotating assembly and valvetrain, better fuel economy and emissions. There isn't a single drawdown with going to a FI platform as long as they properly size the turbos to preserve response. And really, even that isn't a huge issue because with direct injection they're able to use higher compression ratios.
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Old 07-08-2008, 03:03 AM
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Quote:
Originally Posted by LeMansX5
Unfortunately M5 sales are effected due to fuel economy and some owners even sold their M5 as they did not like the V10 guzzling gas with 8-10mpg.
not to mention when you only get a crusing range of only 140-150 miles on a tank.. what fun is that?? take it from somebody who's owned one!
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