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Alpina bringing new B4 Bi-Turbo Cabrio to Geneva

Interested in picking up a new BMW 4 Series with a turbo six? You've got options: you can get the 435i with 300 horsepower or spring for the M4 with 425 hp. But if it's the convertible model you want, we're afraid you'll be limited to the latter as the M division can't help you (at least not for the time being). But that's where Alpina comes in.
The aftermarket tuner closely associated with BMW offers the B4 Bi-Turbo (at least in Europe) with that same 3.0-liter twin-turbo inline-six massaged up to 410 horsepower that starts to pose a threat to the M4. What's more is that the Alpina's 442 pound-feet of torque eclipses the M4's 406 lb-ft, to say nothing of the 435i's 300.
Best of all, Alpina just confirmed via Facebook that it'll offer the B4 in convertible form, bringing the resulting BMW Alpina B4 Bi-Turbo Cabrio to the Geneva Motor Show. We'd expect the weight penalty to knock it slightly off the coupe's quoted 4.1-second 0-60 time, but not by much. If only BMW were to bring this one Stateside like it does with the B7 sedan.

BMW discussing supercar collaboration with McLaren

BMW is reportedly considering a new halo supercar. But rather than go it alone, word has it that the Bavarian automaker is discussing a potential partnership with McLaren to make the idea a reality. This according to Britain's Car magazine, which suggests that negotiations are well underway. The proposal would see the BMW supercar based on the same architecture that will to underpin Woking's P16 project that's set to replace current 650S. Rather than use the 3.8-liter twin-turbo V8 that McLaren developed together with Ricardo, the Bimmer version would use Munich's own engine: a 4.0-liter V8 with quad turbochargers – two conventional spools and two more electrically driven chargers. Their combined effect would net an expected 750 horsepower. Further differentiations on McLaren's carbon monocoque architecture for use in the BMW would include custom bodywork, aerodynamics, and interior fitments to include a unique instrument panel. Production, however, would be handled at the McLaren Production Centre in Woking, to the tune of several hundred units per year. The project would take the place of several aborted programs undertaken internally at BMW. One called for an entirely unique supercar developed in-house, referred to internally as the M100. When that project was aborted so that BMW could concentrate on the i sub-brand, BMW's own skunkworks shifted its focus to developing a more performance-focused version of the i8, known by some as the i8 CSi. When that project was canned as well, discussions with McLaren commenced. It wouldn't be the first time BMW would outsource development of its own supercar, or even the first time BMW would collaborate with McLaren on such a project. Initial development work on the original M1 in the 1970s was undertaken by Lamborghini before being taken in-house. And, of course, BMW provided the engine for the legendary McLaren F1. Meanwhile McLaren performed a similar function for Mercedes-Benz with the SLR, demonstrating Woking's experience in building flagship supercars for German automakers. This latest project could suffer the same fate as the M100 and i8 CSi programs. But if it is approved, it could yield both coupe and convertible versions, with the first slated to surface at the Frankfurt Motor Show in 2017 and reach dealerships in 2019.

2014 BMW M6 Gran Coupe is ready for your favorite roads

We've known about the ins and outs of the lovely BMW M6 Gran Coupe for a while now, but that doesn't mean we weren't happy to see the thing in the metal for the first time, here in Detroit.
The M-tuned Gran Coupe utilizes the same 4.4-liter forced-induction V8 that powers both the BMW M6 and the M5, with an output of 560 horsepower and 500 pound-feet of torque. The fast four-door brings up 60 miles per hour in just 4.1-seconds - the same sprint time as the M6 coupe and a few tenths quicker than the M5 - and up to a limited top speed of 155 mph.
We love those performance figures - this is one new Bimmer that we're amped to get some seat time in - though we're not super crazy about the selection of chrome wheels on this particular show car. Tells us what you think about the hotted up Gran Coupe in comments, below.