BMW Z1 classic cars for sale

History of the BMW Z1

BMW introduced the Z1 as an experimental and image-defining roadster, showcased at the 1987 Frankfurt International Motor Show. Production began in 1989, following a surge of interest after its debut. Conceived and developed at BMW Technik GmbH under designers Harm Lagaay and Ulrich Bez, the Z1 explored new materials, aerodynamics, and design concepts. BMW initially planned for 4,000 cars but doubled output due to early demand, reaching exactly 8,000 units before production ceased in mid-1991. The Z1 marks the first entry in BMW's Z series and served as a technological testbed, featuring innovations such as a galvanised steel chassis and body panels made almost entirely from thermoplastic. The striking slide-down doors, non-structural in nature, allowed for open driving in a literal sense, distinguishing the Z1 on both road and track.

Model Development and Lineage

All Z1 cars were produced as two-seater roadsters with left-hand drive and a single drivetrain: the 2.5-litre M20 inline-six, paired with a five-speed manual transmission. Unlike successors (Z3, Z4), only one body and engine version was available. Early cars featured minor proprietary solutions and unique details (such as specific radios), while later cars received optimization and improved component reliability. No coupe or automatic variants were ever factory-built; the Z1 remained a singular proposition in BMW’s range. The Z1’s successor in the Z line arrived as the Z3 in 1995, which broadened the Z philosophy to a wider market and multiple body styles.

Special Features and Production Data

The Z1’s most famous feature is its vertically retractable doors, which slide into the deep side sills and allow the vehicle to be driven with doors down. The lightweight thermoplastic body panels, mounted to a galvanised monocoque frame, offered modularity and some degree of impact resistance—panels could be swapped out individually. Aerodynamics were at the forefront: a flat undertray, rear diffuser, and uniquely profiled exhaust contributed to the world’s first production car to achieve 1g of lateral acceleration on road tyres. The Z Axle rear suspension, debuting on the Z1, later migrated to other BMWs such as the E36. ABS was standard, as were Recaro sports seats (leather or Alcantara), electric windows, central locking, and 16-inch alloys.

The Z1 is the only BMW classic with a 100% representation within its make and model series listings at Classic Trader, both in terms of supply and search demand—underscoring its specialist position among BMW enthusiasts and classic car seekers.

Technical Data

Special Editions and Collectible Versions

The BMW Z1 was sold almost entirely in its standard configuration, with exterior colour and interior trim being the only configurable options. Notably rare are the "Pur Blau Metallic" (193 produced), "Fun-gelb" (135 produced), and particularly early or late serial-numbered cars. Alpina converted 66 units into the Alpina Roadster Limited Edition, increasing engine displacement and power output to 200 PS, as well as introducing bespoke suspension and wheels—these conversions are the only recognised official special edition based on the Z1 platform.

Weak Spots and Common Issues

The Z1’s technical base is robust, yet the design introduces unique areas of concern. The thermoplastic body panels are prone to hairline or stress cracks and damage at mounting points, particularly on fenders, doors, and bumpers. Aftermarket paint is typical due to common road rash, but proper resprays are not problematic if done well. The true hidden danger lies in the galvanised steel frame: check floorpans and suspension mounts for corrosion; failure here is both serious and costly.

Retractable doors are both innovative and temperamental: worn mechanisms, misaligned sills, or corroded cable pulls can lead to misoperation or complete failure. Ageing soft-tops may leak, and rubber seals harden, admitting water to the cabin or boot. Suspension wear (struts, bushings, steering components) is likely with age; the Z Axle design can render certain repairs costly. The M20 engine is fundamentally strong but demands a fresh timing belt every four years; oil leaks, tired rubber components, or worn Hardy discs are not uncommon. Check brake hoses, fuel lines, and tyres—original-spec rubber from the 1990s now poses a safety risk. Electrical glitches, cloudy lighting lenses, and radio malfunctions (especially early Sony units) are known quirks.

Engine, Performance and Handling

Powered by BMW’s M20B25 straight-six, the Z1 offers 170 PS and 222 Nm, channelled through a crisp five-speed manual gearbox to the rear wheels. Acceleration to 100 km/h is quoted at 7.8 seconds, with a top speed of 225 km/h—impressive figures for a late-80s roadster. The car’s low weight, sophisticated chassis (with all-new Z-Achse independent rear suspension), and almost even weight distribution endow it with sharp, agile road manners. The aerodynamic aids—level underbody, functional diffuser, and tailored front end—allow the Z1 to reach 1g of lateral grip on street tyres, a key engineering achievement at the time. Brake discs all round, ABS, and precise steering complete a package focused on dynamic open-top driving. Top models: Standard Z1 in rare “Fun-gelb” or “Pur Blau Metallic”, and Alpina Roadster Limited Edition (200 PS, 66 units produced, specific wheels and suspension).

Interior, Comfort, Exterior and Design

Designed by Harm Lagaay and Ulrich Bez at BMW Technik, the Z1’s appearance is defined by its wedge-shaped silhouette and unconventional, fully removable body panels. Standard exterior colours included Toprot, Urgrün, Traumschwarz, Magic Violett, as well as rare Fun-gelb and Pur Blau Metallic. The interior was equally distinctive, with Recaro sports seats in a camo pattern Alcantara/leather mix or full leather; some trims stand out for their preservation and rarity. All cars feature a driver-focused dashboard, central console, and three-spoke leather steering wheel. Standard equipment includes a manually operated soft top (with several colour options); factory hardtops are exceedingly rare (occasional Wiesmann units). The stowable doors, electric windows, and weather-resistant plastics reinforce the Z1’s commitment to open-air agility and bold, contemporary aesthetics.

Other Features

All Z1s are two-seater cabriolets, built exclusively as left-hand drive in Germany. No factory automatics or right-hand drive variants were ever made. Standard equipment includes electric mirrors, central locking, and a full toolkit. The Z1 lacks factory air conditioning and cruise control. Factory radios are valued among collectors, varying between early Sony and later BMW Bavaria units. Safety and build documentation are important for insurance and collector value—original keys, manuals, and service books increase a car’s market standing. The Z1 qualifies for historic vehicle registration and favourable taxation in most EU countries.

Summary

The BMW Z1 represents a milestone in BMW engineering, combining advanced materials, radical design, and focused roadster performance. Built in just 8,000 units between 1989 and 1991, each car offers a blend of innovation and purity unique in the brand’s history. The Z1’s distinct construction, engaging driving experience, and robust enthusiast following ensure it remains one of the most recognisable and technically fascinating modern classics from BMW.