The engine is modified by the addition of modified twin-scroll turbochargers having larger inlet and outer dimensions and new compressors for an increased boost pressure of 1.4 bar (20 psi), replacement of the standard pistons with high-strength MAHLE pistons, new NGK spark plugs, a new air-to-water intercooler making use of short charge air intake paths to feed air to the air intake manifold, a revised cooling system with large diameter hoses for uninterrupted flow and additional external water and oil coolers.

The B7 Bi-Turbo uses the same ZF 8-speed automatic transmission as used on a standard 750i but has a reprogrammed Alpina software for faster shift times.

The transmission also has a reinforced torque converter, an extra oil cooler and planetary wheels.

The calibrated air suspension lowers the car by 20 mm (0.8 in) at speeds above 225 km/h (140 mph) for improved performance.

The suspension can also be lowered manually by the same height at low speeds or can be raised for ground clearance by 20 mm (0.8 in).

The multi-spoke alloy wheels on the car measure 20x8.5-inch at the front and 20x10-inch at the rear wrapped in Michelin Pilot Super Sport tyres.

Several options are available for the interior trim, including the Alpina specific Piano black or Myrtle wood.

The digital instrument cluster is a bespoke unit especially developed for the B7 with changing displays depending on the selected driving mode.

[9][10] The exterior changes apart from the wheels include a front chin spoiler and a rear lip spoiler, integrated brake cooling ducts in the front bumper and recalibrated active grille shutters in the twin kidney grille.

[31] The car was presented to the public at the 2019 Geneva Motor Show and deliveries began in July of the same year.

[32] Like its predecessors, the current generation of the B7 is initially assembled alongside the 7 Series models at the BMW Dingolfing plant.