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BMW already considering four cylinders for next M3

The cylinder count in BMW's M3 has fluctuated over the years. The original M3 debuted in 1985 packing a 2.3-liter inline-four, but subsequent models went with sixes until the outgoing generation upped the cylinder count to eight. With its latest model, BMW has dropped back to six cylinders with a pair of turbos taking the place of the extra pistons. But the next M3 sedan and M4 coupe could go back to the model line's roots with a four-cylinder engine.
Speaking with BMW M product manager Carsten Pries at the launch of the latest M3 and M4 in Portugal, our Aussie compatriots at Motoring.com.au report that "you could see a future [M3] powered by a four-cylinder engine." Offsetting the reduction in cylinders, the lighter engine would benefit the vehicle's weight and balance, thus enhancing performance.
We wouldn't expect the next M3 and M4 to lose any power in the process, though: Output in the M3 has only risen over the generations, from 192 horsepower in the four-pot original to 282 hp in the six-cylinder E36, 338 hp in the six-cylinder E46, 414 hp in the V8 E90 and 425 ponies in the new turbocharged six-cylinder F80 model. With that latter model having just debuted, it'll likely be a good six or seven years before the next version comes along, giving BMW plenty of time to settle on an engine - however many cylinders and turbochargers it has. In the meantime, you'll have to forgive us for taking a romp down M3 memory lane in the fresh gallery of images above.

BMW M4 Convertible poised for Goodwood unveil

It shouldn't be a shock that BMW is working on a convertible version of the M4. Not only have we caught it testing twice, but this is an automaker that seems willing to build a vehicle for nearly every buyer's needs. Evo claims that the high-performance droptop is going to debut at this year's Goodwood Festival of Speed in England from June 26-29.
Judging from the spy shots we've seen, the M4 Convertible will consist of a retractable hard top like the 4 Series cabrio. Other than the roof, there aren't expected to be many changes from the coupe. The engine will be the same turbocharged, 3.0-liter inline six-cylinder engine, but the added weight of the roof and its mechanism may take a small bite out of performance.
We spoke to BMW USA about the rumor and were told that it has no comment at this time. After the M4 Convertible, Evo claims that BMW is working on a M4 Gran Coupe. How that would be all that different from an M3, isn't exactly clear.

Autoline streaming live from Detroit Auto Show right now

As you can already see, the Autoblog team is digging deep to bring you everything from the Detroit Auto Show media days today and tomorrow, with obsessive coverage of all of the new sheetmetal, hot concepts and industry news. But we're hardly alone in Cobo Hall, and our friend John McElroy and his Autoline team have fired up a live video webcast with interviews from the show floor that you can watch right now by scrolling below. The daily streaming broadcasts start at 1:00 PM Eastern today and tomorrow, with a large number of A-list executives, designers, and product planners from both domestic and foreign automakers are expected to sit in. Interviewees scheduled to appear include Al Gardner, President and CEO of Chrysler; David Zuchowski, brand-new President and CEO of Hyundai Motor America; Doug Scott, Truck Group Marketing Manager at Ford; and Peter Schreyer, President and Chief Design Officer at Kia. For the live feed and a full list of guests for both days, scroll below. Live broadcast by Ustream [Pop-out Chat Window] Day One Al Gardner, President and CEO, Chrysler Brand Ludwig Willisch, President and CEO, BMW of North America Doug Scott, Truck Group Marketing Manager, Ford Tim Mahoney, Chief Marketing Officer, Global Chevrolet Heiko Schmidt, Head of C-Class Product Planning, Mercedes-Benz USA Filip Brabec, Product Planning Manager, Audi of America Day Two Bob Ferguson, Senior Vice President, Global Cadillac Dave Zuchowski, President and CEO, Hyundai Motor America Mike Manley, President & CEO, Jeep Brand Peter Schreyer, President and Chief Design Officer, Kia Tom Kearns, Chief Designer, Kia Design Center America Jim Lentz, COO, Toyota Motor NA Tony Nicolosi, President & CEO, Volvo Cars North America Jose Munoz, Executive VP & Chairman, Nissan Americas Auto News Detroit Auto Show Audi BMW Chrysler Ford Kia Videos Detroit Autoblog 2014 Detroit Auto Show autoline Peter Schreyer