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BMW dishes on 'lightweight' 2014 M4

BMW's M cars are not what we'd call featherweights. Sure, the big, bruising twin-turbocharged V8s deliver a lot of power, but the fact of the matter is that more weight often equates to less fun.
Which is why we're so excited over a recent sit-down the blokes at Top Gear had with BMW's product manager for small and medium cars, Matt Collins. The chat led to talk of the M3 Coupe replacing M4. Collins confirmed that, yes, the new M4 would be turbocharged. The new engine will also be a six-cylinder, which should make purists happy.
"What we'd like is more focus on lightweight engineering." -Matt Collins

BMW confirms M4 DTM for next season

Fans of BMW performance had two events to keep an eye on this weekend: the reveal of the M4 Concept at Pebble Beach, and the efforts of the Bavarian automaker's DTM teams at the Nurburgring. What ties them together, however, is what BMW has in store for next year.
The German carmaker has confirmed that it's already working on a new M4 DTM to campaign in the highly-competitive touring car series starting next season. It didn't reveal any details, but we can expect the M4 to make the same jump to competition spec as the M3 did before it. And with some success, we might add: successive versions of the M3 have won 48 DTM races over the years, starting with the checkered flag which Harald Grohs claimed at Hockenheim in 1987 through to the same race which Augusto Farfus won earlier this year. After taking home the title for BMW in its first year back in DTM last season, Bruno Spengler also won at the Red Bull Ring in Austria two months ago, but the Bimmer teams seem to be having a bit of trouble defending its title against fresh assaults from Audi and Mercedes.
BMW undoubtedly hopes the new M4 DTM will help it turn another new leaf, and we're looking forward to seeing how it all shapes up. Read more in the press release below.

BMW to offer carbon fiber wheels in a year or two

The Citroën SM sat on the first set of production glass fiber and resin wheels in 1972 when parent company Michelin developed the exotic hoops in order to take the SM rallying. It wasn't until 2008 that we got the first all-carbon-fiber wheel for passenger cars in the form of a prototype model from Weds Sports in Japan that remained a prototype. Australian company Carbon Revolution followed that a year later with its CR-9 all-CF wheel, first introduced on the Shelby Ultimate Aero and now available for independent purchase for about $15,000 per set. BMW could be the first OEM to offer entire wheels in carbon fiber reinforced plastic in two years.
The wheels - either all-CFRP or using a CFRP rim and alloy spokes - were shown off during BMW's Innovation Days in Munich and are products of the development work done on its i-branded cars. The full-CFRP wheel is 35-percent lighter than a forged alloy wheel, the hybrid alloy and CFRP wheel is 25-percent lighter, making for a decent drop in unsprung rotating weight. As demonstrators during a tech day the wheels aren't yet in the pipeline for production and EU approval, but an article in Auto Express claims that they could be on the market as soon as two years from now.
Other possible parts include a full carbon fiber steering wheel and propeller shaft, the latter of which is coming as a single-piece component on the new M3 and M4. BMW is also talking up its use of secondary carbon fiber - waste material from i3 and i8 production - that can be used for items like IP support structures, seat frames and spare wheels in place of traditional metals like aluminum and magnesium. There's an excerpt of the Innovation Day press release below with more details.