The press days for the Frankfurt Motor Show have come and gone and Alpina, finally made the long awaited preview of their tuning program for the BMW 6-Series Convertible..

Called the ’B6 Bi-Turbo Cabrio’, Alpina has improved the luxury cabriolet’s performance capabilities by adding its own twin-turbo system - hence the name - together with MAHLE pistons and a high-performance cooling system.

As a result, the 6-Series Convertible’s 4.4-liter V8 engine gained some significant ponies, pushing the standard output of 400 horsepower and 450 lb/ft of torque all the way up to 500 horsepower at 5,500 rpm and 516 lb/ft of torque between 3,000 and 4,750 rpm. Alpina also revised the gearbox on the car, putting in a new eight-speed automatic transmission.

Together with this revised gearbox, the 25% increase in output allows the Alpina-tuned ’B6 Bi-Turbo Cabrio’ to hit 0-62 mph in just 4.8 seconds (up from 4.9) with a top speed hitting an impressive 193 mph, a stark improvement from the standard model’s electronically limited top speed of 155 mph.

On top of that, the Alpina-tuned 6-Series Convertible averages 10.9 L/100km (25.9 mpg UK / 21.5 mpg US) and emits 255 g/km, impressive numbers for a car of this stature.

The car will make its official debut in Geneva next March, but at the very least, we’re getting a good idea on what Alpina has done to improve on the 6-Series Convertible’s already impressive performance capabilities.

  • 2012 BMW 6-Series Cabriolet by Alpina
  • Year:
  • Make:
  • Model:
  • Engine:
    V8 engine
  • Horsepower @ RPM:
  • MPG(Cty):
  • Torque @ RPM:
  • Displacement:
    4400 L
  • Top Speed:
    193 mph
  • 0-100 time:
    4.8 sec.
  • car segment:
  • body style:


Kirby Garlitos
Automotive Aftermarket Expert -
Kirby’s first exposure into the world of automobiles happened when he caught Knight Rider on television as a five-year old boy. David Hasselhoff didn’t leave much of an impression on him (that happened later on in Baywatch), but KITT certainly did. To this day, Kirby remains convinced that he will one day own a car with the same ‘spirit’ as the original KITT (not the 2008 monstrosity). He doesn't know when that will be, but until then, he’s committed to expressing his love for KITT, and all cars for that matter, here at TopSpeed.  Read More
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  (692) posted on 01.1.2012

The Cabrio version on the 6-Series really makes quite elegant and luxurious! The increase on its maximum speed is awesome as well.

  (613) posted on 12.15.2011

I like the exterior and interior part because its simple and it’s really good to the eye. The style of this car is very impressive for the fact that it has a retractable roof.

  (347) posted on 12.13.2011

This BMW cabriolet still looks great on its aesthetic design, and it’s a good thing that it also has an impressive and comfortable interior and even an awesome and efficient engine which is very suited for it.

  (517) posted on 12.2.2011

I just only love its efficient engine output. It seems that it’s so fun to drive with because on that. However, I think they should use a lighter body paint than on what they use on it.

  (394) posted on 10.21.2011

One of the cars with convertible roofs I would love to have in the future. It is elegant and celebrity-like car. Now I adore BMW next to vintage cars.

  (334) posted on 10.6.2011

I wonder why they say that this BMW 6-Series is a luxurious one. Sure, it had an impressive interior touch but the exterior appearance looks so ordinary for me, and I can’t see the luxurious side of it.

  (630) posted on 10.4.2011

Very improve and impressive concept. I like the concept and the fact that is convertible. Very sporty while very luxurious.

  (474) posted on 09.28.2011

If I’m going to compare this one to the other convertible car that I already saw, sorry to say that I would not really line up this one on those fabulous and impressive cars. I just don’t also like the looks that it had but surely the interior seems so relaxing.

  (797) posted on 09.27.2011

The brown paint of car looks great and its unique for this kind of car. The style of this car is so great and the design is simple. With the 500 Horse power and V8 engine is great for the style of this car.

  (466) posted on 09.26.2011

I barely see cars having that body paint, so I say that I’m impressed with it, and I don’t find it boring or ugly, just like what other say. And I noticed that the cozy and relaxing interior of it is very impressive.

  (577) posted on 09.23.2011

BMW top down cars are really means luxury, an elegant car with top speed engine.

  (531) posted on 09.23.2011

It’s simple style for BMW car and i don’t like the color of the car. However, I know the performance of this car is really great.

  (528) posted on 09.22.2011

The sporty figure performance of this Cabriolet is quite impressive, but I have to agree it’s also sort of dangerous for a convertible car like this.

  (365) posted on 09.21.2011

sorry to say, but it seems that the interior design is boring but just like them I’m also impressed with the exterior simple styling of this convertible car.

  (382) posted on 09.21.2011

The elegance of a BMW car is still there, but what makes this car be famous? The engine! an elegance car with a top speed engine what could you ask for

  (488) posted on 09.21.2011

It’s really a rapid car, a great, convertible and strong looking BMW 6-Series Cabriolet. It has a very high-technology car.

  (248) posted on 09.16.2011

2012 BMW 6-Series Cabriolet has 500 horse power this is nice. The style of the car is really great.

  (256) posted on 09.16.2011

I don’t like the paint that they used on it, but I noticed its front headlights. It is really cool, but I think V8 engine is not quite good enough for it.

  (287) posted on 09.14.2011

Looks so aggressive for me especially with its front design and front light. It seems that this Cabriolet is a snob. smiley

  (448) posted on 09.8.2011

Well, I have to say that I’m truly impressed with the platform of the Cabrio. And I don’t think that it is necessary to boost the figure performance of the car. The 400 hp deliver power output is kind of dangerous already.

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