The B6 BiTurbo is based on the BMW 650i.

In September 2011, at the IAA motorshow, the B6 BiTurbo was introduced as Cabrio. This was the same motorshow where the BMW M6 had its world premiere – as Coupe.

In December 2011, at the Tokyo motorshow, the Coupe version of the B6 BiTurbo was launched. The showcar was presented in a new paint color – Alpina Blue matt.

In August 2012, the LCI version of the B6 BiTurbo was introduced.

In early 2016, after the B6 BiTurbo Edition 50 production was sold out, production of the regular B6 BiTurbo – now with 600hp – was reinstated.

Production of the Coupe version of the B6 BiTurbo ended in late 2017. Production of the Cabrio version of the B6 BiTurbo ended in summer 2018 due to F12/F13 6-series being phased out by BMW.

The engine in the B6 BiTurbo was initially introduced in the B7 BiTurbo. It is based on the BMW 650i engine, with custom Alpina engine block, cylinder heads and internal parts. It has been modified to 540hp and 730Nm. Heat management is improved by installing new turbo compressors, custom Alpina cooling package with radiator, engine oil cooler, transmission oil cooler, as well as extensive custom Alpina air ducting and intercooler. Also, an additional electric water pump is installed.

From early 2016, the B6 Biturbo engine was upgraded, now to 600hp and 800Nm.

As standard, the B6 BiTurbo has a titanium exhaust from Akrapovič.

The only available gearbox is the 8-speed Sport-Automatic transmission (ZF 8HP70) with Switchtronic.

Optionally, a Drexler limited slip differential is available.

The B6 BiTurbo suspension is based on the 650i, modified with Alpina settings and springs. The wheel carriers are heavy-duty items sourced from the BMW 7-series. The driveshafts are custom Alpina parts.

A custom Alpina crossbar is installed at the rear.

Wheels are 20-inch Alpina Classic wheels with 255/35 and 285/30 Michelin Pilot Super Sport tires.

The front brakes are sourced from the high-speed version of the F01 750i. The rear brakes are from the F10 550i.

The B6 BiTurbo undergoes the same interior changes as usual with Alpina. Cluster gauges are custom Alpina with classic blue background combined with steering wheel trimmed in Lavalina leather. Additionally, interior trim is fine Alpina wood or piano lacquer with Alpina logos. A no-cost option are Alpina badges in the seats. Optionally, a custom interior in Lavalina leather can be ordered.

For the exterior, the changes are limited to an Alpina frontspoiler with carbon splitters, rear spoiler, rear diffusor and Alpina badges on the rear. The spoilers were available in color-coded or clear carbon. A non-cost option is the classic Alpina decor on sides of the car and frontspoiler. Available exterior colors include Alpina Blue and Alpina Green II.

Acceleration from 0-100kph is 4,3 seconds.
For the 600hp version, this reduced to 4,2 seconds.

For the initial 540hp version, top speed is 317kph for the convertible and 320kph for the Coupe version.
With the 600hp version, this increased even more to 327kph for the convertible and 330kph for the Coupe version.