The D4 S Gran Coupe is based on the BMW M440dX Gran Coupe. It is the first diesel-engined model of the Alpina 4-series offered only as Gran Coupe version.

The D4 S Gran Coupe replaces the Coupe version of the previous generation F32-based D4 BiTurbo.

In June 2022, the D4 S Gran Coupe was introduced.

The D4 S Gran Coupe engine is based on the BMW 440d engine, which has been modified to 355hp and 730Nm. The engine is supported by energy recuperation by a 48V starter generator. The 11hp electrical mild-hybrid power support ensures responsiveness to gaspedal inputs at low engine speeds.

The only available gearbox is the 8-speed Sport-Automatic transmission (ZF 8HP76) with Switchtronic.

An electronically controlled limited slip differential is standard, ensuring a rear-wheel drive bias.

The D4 S Gran Coupe has adaptive sport suspension with electronically adjustable dampers, performance springs, bump stops and stabilisers. The suspension is modified with Alpina settings.

Wheels are 20-inch Alpina Classic with 255/35 and 285/30 Pirelli P Zero tires specifically developed by Pirelli for Alpina. The wheels are optionally available in black or anthracite.

The performance brake system – adopted from the G30 B5 BiTurbo Allrad – features four-piston fixed brake calipers in blue with Alpina lettering and floating brake calipers at the rear. Brake disks are 395mm (front) and 345mm (rear). Optionally, high-performance drilled disks and high heat-resistant pads are available.

The D4 S Gran Coupe 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 and Alpina badges on the rear. 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 4,8 seconds.
Topspeed is 270kph.