BMW M ONE-OFFS: PROTOTYPES.

While the performance figures of the BMW M2 Competition F87 – 302 kW (410 hp), 550 Nm maximum torque, 280 km/h top speed – placed the 2018 model at the top of its segment, the engineers were simultaneously exploring the possibilities for the next level of performance. Based on the M2 Competition and integrating parts from the M4 GTS, the BMW M2 CSL was created as a compact performer with racing credentials. This was evident not only from the carbon rear wing on red struts, a red roll cage and a red-painted lip on the front splitter.

The M2 CSL was also designed as a pure two-seater to save weight and was trimmed to maximum lightweight construction with racing bucket seats, a CFRP centre console and a carbon-ceramic brake system. With its upgraded engine producing 331 kW (450 hp) and a maximum torque of 550 Nm, the result was a purist sports car. At the same time, an M2 CS with the same performance and slightly more daily-driver features was built. Both vehicles were presented internally for a decision – the M2 CS was given the go-ahead, becoming the sportiest variant of the successful M2 model series. The BMW M2 CSL remained a one-off.

The 1996 BMW M3 E36 Compact was an uncompromising prototype – never mass-produced, but style-defining. Its S50B32 inline six-cylinder engine delivered an impressive 236 kW (321 hp), which, with a kerb weight of only around 1,300 kg – roughly 150 kg less than the series production BMW M3 Coupé E36 – made for astonishing agility. A purist interior, roll bars and Recaro seats underlined its radical sporting credentials. In addition, the body was shortened by around 23 cm at the rear, while the wheelbase remained unchanged. The result: a highly dynamic, almost rebellious compact sports car.

In use, the BMW M3 Compact proved so uncompromising that it would have been an option only for experienced drivers. It therefore remained a prototype, but is nevertheless considered by many to be a pioneer for later M icons such as the BMW 1 Series M Coupé and the BMW M2. And its influence continues to this day: over the years, a number of M3 Compact fans have rebuilt the car on their own, taken it to racing events and even obtained road registrations for it. 

The BMW M3 has been an icon since 1986. The third generation of this successful automobile, the BMW M3 E46, ranked as one of the best-selling M models at the beginning of the millennium and was available as a coupé and convertible. But a third body variant was already waiting in the developers’ drawers: the BMW M3 E46 Touring Concept. Initially, the one-off Touring was kept a closely guarded secret. It was not until 2016 that M GmbH announced the model to the public – by which time it was already over 16 years old. But it was a sight to behold. The prototype featured body modifications, high torsional rigidity and the sophisticated design of the BMW M3 rear axle and combined it with the usable cargo space of a Touring. It was powered by a 252 kW (343 hp) S54 inline six-cylinder engine and was recognisable as an M car by its widened wheel arches, the power dome on the bonnet, larger air intakes at the front and a four-pipe exhaust system.

The BMW M3 E46 Touring Concept remained a one-off. The concept of an M3 Touring, however, did not. In 2022, the first production Touring based on the M3 was unveiled: the BMW M3 Touring G81.

To mark the 25th anniversary of the BMW M5 in 2009, a special prototype was unveiled to the public: the BMW M5 CSL V10 Prototype E60. It was inspired by the success of its series counterpart, the BMW M5 E60, which had been thrilling high-performance enthusiasts with its performance figures since its market launch in 2005: a 5.0-litre naturally aspirated V10 engine and an impressive 373 kW (507 hp) at 7,750 rpm, with a maximum speed of 8,250 rpm.

To demonstrate the further performance potential of this engine, the engineers created the BMW M5 CSL Prototype E60 V10 and developed two ten-cylinder engines with 5.5 and 5.7 litres of displacement. The 5.7-litre engine ultimately delivered 463 kW (630 hp) at 8,750 rpm. The red line could only be reached past an enormous 9,000 rpm. In addition, thanks to a carbon roof, Recaro seats and the omission of rear seats, a weight saving of around 150 kg was achieved. With additional fine-tuning to the chassis, the modifications enabled the BMW M5 CSL Prototype E60 V10 to achieve an impressive lap time of 7:50 minutes at the Nürburgring. Both the revised V10 engine and the M5 CSL were to remain unique.

In 1993, M GmbH, in collaboration with the newly founded BMW Individual team, surprised fans and experts alike. The BMW 530 iX Enduro was a family-friendly Touring that, thanks to its high roof, could easily accommodate two bicycles in the rear and still leave plenty of room for cooling boxes and camping furniture. Based on the popular E34, M GmbH and BMW Individual created an all-purpose sports car with M genes: all-wheel drive, a roof raised by 13 cm with a double sunroof, a spoiler on the front edge of the roof with integrated searchlights and steel plates on the underbody for a smooth off-road experience. Air suspension was also used for the first time, allowing the high-roof touring car to vary its ground clearance – in both directions. This meant that the vehicle could also be lowered below the standard height to better hug the road. Combined with the 3.0-litre six-cylinder engine with 181 kW (246 hp) and a maximum torque of 316 Nm, it delivered a driving experience typical of an M model. A speed of 200 km/h was easily achievable – a clear statement for the time with this special vehicle concept.

The BMW M6 E63 CSL V10 was an uncompromising prototype with a high-revving 5.7-litre V10 engine that developed an impressive 463 kW (630 hp) at 8,250 rpm. However, the developers of this prototype focused primarily on aerodynamics. For the first time, this test vehicle featured ‘active’ aerodynamics in the form of an automatic rear spoiler and a retractable front spoiler. In conjunction with a significant reduction in weight, this was intended to improve performance and driving dynamics. Another new feature of the test vehicle were the M exterior mirrors with double struts – which have become an integral part of M models today and whose basic design was developed in the wind tunnel for the BMW M6 E63 CSL V10 prototype.

After the BMW Z1 – originally developed as a brand image booster and technology carrier – had become a huge success with sales of 8,000 vehicles, BMW began planning a series-production roadster in 1990. To hedge against exchange rate fluctuations of the US dollar, the two-seater was to be built at the plant in Spartanburg, South Carolina, which was in the planning stages at the time.

The design of the Original BMW Roadster was penned by Ulf Weidhase, who also contributed to the design of the BMW 850 CSi E31 and the BMW M3 E46. The Original Roadster was a so-called design function car – a prototype whose newly designed body rested on a functional platform, in other words, a drivable car. In 1997, the concept of the Original Roadster finally gave rise to the BMW Z3 M. 

The BMW X5 Le Mans is a legendary experiment based on the X5 E53: its 6.1-litre V12 engine came from the V12 LMR, Le Mans winner of 1999 and now a BMW Motorsport legend, and gave the utility vehicle unprecedented performance. Thanks to 700 hp and a maximum torque of 720 Nm, the X5 Le Mans accelerated from 0 to 100 km/h in just 4.7 seconds and reached a top speed of 311 km/h during Hans-Joachim Stuck’s record-breaking drive on the Nordschleife of the Nürburgring – a figure that is stupendous even by today’s standards for this vehicle class. The lap time set by Stuck in 2001 was a record that stood for almost 20 years and was only beaten in 2020.

This makes the BMW X5 Le Mans the technical precursor to the BMW X5 M, which was unveiled in 2009.