# Unveiling of the Bovensiepen Spider roadster

> Live situation record from CLSTR: https://clstr.news/situations/unveiling-of-the-bovensiepen-spider-roadster
> Updated: 2026-09-13T00:01:07.000Z. Sources: 22. Developments: 2.

Bovensiepen Automobile, a new marque established by the founding family of Alpina, has unveiled the Spider, a limited-edition roadster based on the BMW Z4 M40i. Designed in collaboration with Frank Stephenson, the vehicle features a redesigned exterior including a new front splitter, side skirts, a rear diffuser, and 20-inch forged wheels.

The Spider is powered by a modified 3.0-liter turbocharged straight-six engine producing 435 hp and 580 Nm of torque. It can accelerate from 0 to 100 km/h in 4.2 seconds, with a top speed of 260 km/h that can reach 295 km/h via an optional Performance Package.

Production is strictly limited to 99 units worldwide, each featuring a unique production number plate. The car will be available in five exclusive metallic colors, with custom orders also possible. Deliveries are expected to begin in the first quarter of 2027, with a starting price of €115,500 in Germany.

## Timeline

### 2026-09-13: Bovensiepen Spider unveiled as high-performance BMW Z4 successor

The Bovensiepen family has unveiled the Spider, a limited-edition 429 hp roadster based on the BMW Z4, featuring design by Frank Stephenson and a production run of only 99 units.

8 sources. https://clstr.news/cluster/bovensiepen-spider-unveiled-as-high-performance-bmw-z4-successor

### 2026-09-10: Bovensiepen unveils Spider, a limited BMW Z4-based roadster

Bovensiepen Automobile has announced the Spider, a limited 99-unit roadster based on the BMW Z4, featuring 435 hp and design by Frank Stephenson. Deliveries begin in early 2027.

14 sources. https://clstr.news/cluster/bovensiepen-unveils-spider-a-limited-bmw-z4-based-roadster

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Cite as: Unveiling of the Bovensiepen Spider roadster. CLSTR, https://clstr.news/situations/unveiling-of-the-bovensiepen-spider-roadster