The exceptionally smooth twin turbocharged 3.0 liter in line six-cylinder engine from the BMW ALPINA B3 S Bi-Turbo - with its massive torque and effortless performance - is also employed in the B3 GT3.
By re-designing sections of the exhaust system and fitting a new rear silencer the exhaust back pressure has been reduced, increasing output in the B3 GT3 by 8hp. The direct petrol injected engine now delivers a total power output of 408hp at 6000rpm and 540Nm of torque at 4500rpm.
High performance fixed calliper brake system
Besides exceptional acceleration, in 4.5s from 0-100km/h, and a fulminant power delivery, negative acceleration also plays a pivotal role in satisfying the demands of enthusiast drivers.
The B3 GT3 features a high performance motor sport brake set-up with 6-piston fixed callipers at the front and 4-piston fixed calliper at the rear, with grooved discs measuring 380 x 35 mm at the front and 355 x 32 mm at the rear. The brake callipers are painted in blue with discrete ALPINA writing in silver.
Overall, the brakes are designed for high stress and load under forced conditions and are characterised by excellent fading resistance, good modulation (control) and response - without sacrificing comfort and practicality.
Titanium rear silencer and tailpipes, lightweight made by Akrapovič
Developed in collaboration with Akrapovič, the renowned specialist for Titanium exhaust systems, the B3 GT3 exhaust system is lightweight, impressive yet elegant in appearance and, in keeping with the character of the car, has a raspy sound.
The use of Titanium for the rear silencer and tailpipes, in addition to other constructional design measures such as the removal of the middle silencer, the use of an x-section and significantly larger diameter pipes, has resulted not only in a reduction in back pressure but also a weight saving of 33% (11kg).
Taking design cues from the B6 GT3 race car and in order to support weight reduction efforts, the exhaust system ‘only‘ has two typically ALPINA oval shaped tailpipes but of increased diameter (115mm). In addition to its heat protective function, the lightweight carbon tailpipe trim provides for a more aggressive design.
Extensive sound development measures where aimed at achieving a natural, unfiltered and typical six cylinder sound.