Rare Car Archive

Makes › Bovensiepen Germany › Spider (BMW Z4 G29 based) · Rare specification Extremely Rare

Bovensiepen
Spider (BMW Z4 G29 based)

Bovensiepen Spider on the BMW Z4 M40i, limited to 99 units.

Still being researched: why it matters, identification guide, full specifications. Everything shown is checked against the cited sources. Know more? Send us a source.

IDENTIFICATION CARD · BOVENSIEPEN SPIDER (BMW Z4 G29 BASED)
No licensed photograph yet. Photographs are published only when their licence permits it.
99BuiltIndependently researched
0Chassis documentedin this archive
?SurvivingNot yet verified
Contents
  1. 01Overview
  2. 02Production & history
  3. 03Specifications
  4. 04Colours & options
  5. 05Individual cars
  6. 06Reference

01Overview

At a glance

Built
99 Built
Years
Not yet verified
Engine
Not yet verified
Power
324 kW / 441 PSFactory: 435 hp · converted
Top speed
295 km/hFactory: 183 mph · converted
Body
Not yet verified
Designer
Not yet verified
In this archive
Not yet verified
Surviving
Not yet verified

Sources and any conflicting figures are in the sections below.

Why it matters

Not yet documented. Have a source? Contribute it.

How rare is it?

Six separate kinds of rarity – never combined into one number.

Model rarityNot yet assessed
Specification rarityExtremely Rare 99 · Built1
Colour rarityNot yet assessed
Individual rarityNot yet assessed
Historical rarityNot yet assessed
Survival rarityNot yet assessed

Each kind of rarity is rated separately and never combined.

02Production & history

Production

Every figure says what it counts.

What is countedFigureBasisStatus
Factory package productionunits, limited edition 991 Factory production Independently researched

Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.

History

Motor1 reports the Bovensiepen Spider is based on the BMW Z4 M40i, limited to 99 units and priced from 115,500 euros in Germany.

Variants

How each version differs from the standard Spider (BMW Z4 G29 based).

No variants documented yet. Have a source? Contribute it.

03Specifications

Technical specifications

Engine

Engine familyNot yet verified
Engine codeNot yet verified
LayoutNot yet verified
DisplacementNot yet verified
BoreNot yet verified
StrokeNot yet verified
Compression ratioNot yet verified
Fuel systemNot yet verified
Power 324 kW / 441 PSFactory: 435 hp · converted2 Independently researched
Power atNot yet verified
Torque 580 NmFactory: 428 lb-ft · converted2 Independently researched

Transmission & drivetrain

GearboxNot yet verified
GearsNot yet verified
Driven wheelsNot yet verified

Chassis, body & dimensions

ChassisNot yet verified
Front suspensionNot yet verified
Rear suspensionNot yet verified
BrakesNot yet verified
SteeringNot yet verified
Body constructionNot yet verified
WheelbaseNot yet verified
LengthNot yet verified
WidthNot yet verified
HeightNot yet verified
Front trackNot yet verified
Rear trackNot yet verified
Kerb weightNot yet verified
Dry weightNot yet verified

Performance

Maximum speed 295 km/hFactory: 183 mph · converted2 Independently researched
0–100 km/hNot yet verified
Fuel tankNot yet verified

“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.

04Colours & options

Factory colours & interiors

Original paint and trim, with the number of cars in each where a source gives it.

Not yet documented. Have a source? Contribute it.

Factory options & codes

Codes are shown exactly as written by the manufacturer.

Not yet documented. Have a source? Contribute it.

05Individual cars

Chassis register

Every documented car, with its colours, history and where it is now. Open a row for the full record. Known chassis are not automatically authenticated originals.

Not yet documented. Have a source? Contribute it.

Competition history

Every race result of the individual cars, in date order. Click a chassis number to open its full record in the register.

Not yet documented. Have a source? Contribute it.

Auction & sale history

Documented public sales of the individual cars. Click a chassis number to open its full record in the register.

Not yet documented. Have a source? Contribute it.

See one in person

Museums where an example of this car can be seen.

No example is documented on public display yet. Have a source? Contribute it.

06Reference

Identification guide

How to tell an original from a replica or later conversion.

Not yet documented. Have a source? Contribute it.

Sources

Each number links to the exact facts it supports.

  1. 1
    BMW Z4 Makes Surprise Return, But It'll Cost You Level C
    • 99 units, limited edition
    Accessed 2026-11-13
  2. 2
    Bovensiepen Spider based on BMW Z4 M40i Level C Motor1
    • makes 435 hp and 428 lb-ft
    • 183-mph top speed when equipped with the Performance Package
    Accessed 2026-11-13

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