Car Classes of NLS & 24 Hours of Nürburgring Explained

How the Nürburgring class system works

If you are new to NLS or the 24 Hours of Nürburgring, the easiest way to think about the grid is as a mix of GT cars, Cup cars, touring cars, production-based cars and special projects. The organisers do not simply line cars up by peak horsepower. Instead, classes are built around technical rules.

In practice, performance is measured in a few different ways. At the top end, classes such as SP9 and SP10 use internationally recognised GT regulations and Balance of Performance, so the goal is to equalise cars from different manufacturers. Elsewhere, classes are separated by engine displacement bands, power-to-weight formulas, tyre restrictions, drivetrain layout or single-make rulebooks. That is why two cars can look similar in the paddock yet belong in very different classes on the timing screen.

• Homologation classes: GT3, GT4, GT2 and TCR follow established international rule sets.
• Capacity-based classes: many SP, V and H classes are split by engine size.
• Power-to-weight classes: VT categories are measured more by output and mass than by brand or body style.
• Single-make classes: Cup 2, Cup 3 and the BMW one-make classes are easier to read because every car is broadly the same model.
• Alternative-fuel classes: AT entries are grouped separately, then performance-balanced inside that system.

SP9: the headline GT3 class

SP9 is the class most fans learn first because it is the one that usually decides the overall race win. These are FIA GT3 cars: purpose-built customer race cars from brands like Porsche, BMW, Mercedes-AMG, Audi, Ferrari, Lamborghini and Aston Martin. They are fast, wide, aero-heavy and among the most polished endurance cars in the field.

The important thing to understand is that GT3 performance is not set by engine size alone. It is shaped by Balance of Performance, which adjusts factors such as weight, power or restrictors to keep different brands competitive. That is why a front-engined Mercedes-AMG GT3, a rear-engined Porsche 911 GT3 R and a mid-engined Lamborghini Huracán GT3 can all fight on similar terms.

For spectators, SP9 is the easiest class to spot as the top category: these cars usually qualify near the front, look the most aggressive aerodynamically, and carry the factory-supported or factory-adjacent driver line-ups. In NLS, SP9 is also split into Pro, Pro-Am and Am sub-categories, so even inside the class there are different levels of driver strength.

For a deeper explanation of GT3 rules, BoP and why GT3 cars from different manufacturers can race together, see our full guide: GT3 cars explained.

SP-Pro, SP-X and SP11: the specialist upper-tier classes

Once you understand GT3, the next step is to grasp the classes that sit around it. SP-Pro and SP-X are the classes where the Nürburgring rulebook gets more specialised. They are not mainstream “showroom” categories in the same way GT3 or GT4 are.

SP-Pro is for 24h-special machinery that does not slot neatly into the standard homologated ladder but is still serious, fast equipment. These entries often feel like one-off or niche high-end projects rather than a full brand-wide customer-racing category.

SP-X is the class for special vehicles admitted on specific application. It is the home for unusual, innovative or less easily categorised race cars. Sometimes these cars are very quick. Just as importantly, they usually tell you that the Nürburgring still leaves room for engineering creativity. The engines need to be over 3.0 litres and restrictors may be applied.

SP11, where present, covers SRO GT2 machinery. GT2 cars are an interesting halfway point in the GT world: they tend to have a lot of straight-line punch but less aero sophistication than GT3, which gives them a different feel on track. They are not normally the default overall-winning choice, but they add another layer to the top end of the entry.

Performance indicators: SP11 tends to be high power with medium-to-high aero; SP-Pro varies by restrictor and build; SP-X varies the most, because the whole point is to allow cars that do not fit normal class boxes. If an SP-X car is eligible for top qualifying, it normally means the team has applied and the car has at least 450 hp.

SP10: GT4, the more accessible GT class

GT4-style car image.

SP10 is the Nürburgring’s GT4 class. If SP9 is the top-tier GT category, SP10 is the logical step down: still serious race cars, still production-based, but less extreme than GT3 in power, aero and outright pace. GT4 cars are typically a little closer to the road cars they started from, which makes the class easier for newer fans to relate to.

That also means the racing often feels a touch more transparent. With less aerodynamic dependency and lower outright speed than GT3, the strengths and weaknesses of a chassis can be easier to read. You often get a clearer sense of which cars are strong in traction zones, which ones carry corner speed well, and which teams are simply executing the race better.

For more on how GT4 differs from GT3, see our dedicated guide: GT4 cars explained.

Like SP9, SP10 also carries driver-category distinctions in NLS. It is one of the best classes for understanding the bridge between top-level GT racing and more affordable customer endurance racing.

Cup 2 and Cup 3: Porsche one-make endurance racing

Porsche 911 GT3 Cup (992).

Porsche Cayman / GT4 Clubsport style machinery.

The Porsche cup structure is one of the clearest parts of the Nürburgring grid. Cup 2 is for the Porsche 911 GT3 Cup (992), while Cup 3 is for the Porsche Cayman GT4 Clubsport family used in the Porsche Endurance Trophy structure.

These classes are useful because they remove the brand-versus-brand comparison. Everyone is working from essentially the same base car, so the focus shifts toward setup, tyre use, traffic management, strategy and driver quality. That makes them an excellent class for fans who want to see what a “spec” endurance category looks like.

Cup 2 cars are serious, fast 911-based race cars and tend to sit toward the sharper end of the field outside GT3. Cup 3 is less intimidating, more approachable and often a very good reference point for understanding the difference between a Cayman-based GT4-style race car and the larger, faster 911 Cup concept.

• Cup 2: Porsche 911 GT3 Cup type 992 from model year 2021. High-performance 911 Cup car, strong braking, serious mechanical grip and moderate aero. Faster and more demanding than Cup 3.
• Cup 3: Porsche Cayman GT4 Clubsport type 982. Lower power and less aero than Cup 2, but still a proper race car. Usually more approachable and more forgiving.

Performance indicators: These classes are less about BoP between brands and more about driver execution. Because the cars are similar, differences in lap time often come from setup, tyre use, traffic decisions, pit work and consistency. Cup 2 sits closer to the sharp end; Cup 3 is more of a GT4-style endurance platform.

TCR: front-wheel-drive touring cars

TCR is the international touring-car formula that brings front-wheel-drive, turbocharged saloon and hatchback race cars into the Nürburgring world. If GT cars look exotic, TCR cars look familiar: they resemble recognisable road-car shapes such as the Audi RS 3 LMS, Hyundai Elantra or i30-style silhouettes, Honda Civic Type R, Cupra Leon and similar machinery.

This class is valuable because it adds a totally different racing style. TCR cars usually have less power and less downforce than the top GT machinery, but they compensate with robustness, slipstreaming, kerb use and close-packed battles. They move around more, they tend to look busier on the limit, and they are easier for many spectators to compare directly to road-derived performance cars.

As a fan category, TCR is one of the best classes for learning the difference between GT racing and touring-car racing. If the GT field feels dramatic and theatrical, TCR often feels more combative and scrappy in the best possible way.

BMW one-make classes: M240i, M2 and BMW 325i

NLS has long had a strong culture of accessible, production-based one-make racing, and the BMW classes are a big part of that. Depending on the season and event, you will see dedicated grids or class groups for BMW M240i Racing, BMW M2 Racing and BMW 325i machinery.

These classes matter because they create some of the most even racing in the paddock. With the car specification tightly controlled, small differences in driver consistency, pit work and racecraft become much more obvious. They may not be the first classes casual viewers notice, but they are often among the most satisfying to follow once you understand what you are watching.

If you like the idea of a class where the car itself is less of a variable and the competition is decided more by execution, the BMW cups are a great place to spend time. They also give the field a distinctive grassroots-to-semi-professional layer that is central to the identity of NLS.

• BMW M240i Racing: A controlled BMW cup platform. Medium power, limited aero, strong durability and close like-for-like racing.
• BMW M2 Racing: A newer BMW cup-style platform with more modern performance characteristics. Still much more controlled than open special classes.
• BMW 325i Challenge: Lower-cost, production-based BMW racing. Lower power, low downforce and strong emphasis on momentum, reliability and traffic awareness.

Performance indicators: These classes are not about huge downforce or outright top speed. They are about equal machinery, clean driving and endurance execution. If two BMW cup cars are separated by a big margin, it is more likely to be down to driver pace, setup, incidents or pit work than a major car-performance advantage.

V and VT classes: production-based cars with different levels of modification

The V classes are the more traditional production-car categories. In simple terms, they are grouped largely by engine displacement and capped performance. The ladder runs through classes such as V3, V4, V5 and V6, so a fan can read them as progressively larger-engined production-based categories.

The VT classes move the idea on. They are still rooted in production cars, but the rule structure relies more heavily on classification lists and power-to-weight logic. VT1, VT2 and VT3 therefore feel like a more performance-shaped grouping than the simpler engine-band structure of the V classes.

VT2 is especially worth understanding because it is split by drivetrain. Front-wheel-drive and all-wheel-drive entries are classified separately from rear-wheel-drive entries, which makes the class much easier to follow fairly. This is one of the best examples of Nürburgring organisers recognising that “same lap time potential” does not always mean “same type of car”.

V and VT are where the field often feels closest to recognisable performance road cars.

• V3: Up to 2,000 cc, maximum 140 kW, minimum 900 kg, maximum fuel capacity 65 litres. Low power, low downforce, relatively light, and very dependent on clean driving.
• V4: Over 2,000 cc up to 2,500 cc, maximum 160 kW, minimum 1,200 kg, maximum fuel capacity 70 litres. More torque and mass than V3, but still a production-car style class.
• V5: Over 2,500 cc up to 3,000 cc, maximum 219 kW, minimum 1,300 kg, maximum fuel capacity 70 litres. Noticeably stronger performance, but still limited compared with Cup or GT machinery.
• V6: Over 3,000 cc up to 3,500 cc, maximum 265 kW, minimum 1,350 kg, maximum fuel capacity 70 litres. The strongest regular V class, with more straight-line speed but more weight to manage.

V Performance indicators: V cars are low-downforce, production-based machines. Their lap time comes from consistency, braking stability, tyre preservation and staying out of trouble rather than big wings or huge power. They are excellent classes for understanding the grassroots side of Nürburgring endurance racing.

• VT1: Turbocharged production cars with maximum 201 kW and a minimum reference of 7.8 kg/kW. Low-to-medium power, low downforce and strong emphasis on reliability.
• VT2 Front / 4WD: Turbo cars with front-wheel drive or all-wheel drive. Maximum 228 kW. The class uses different kg/kW references for front-wheel drive and all-wheel drive to account for traction differences.
• VT2 Rear: Rear-wheel-drive turbo cars with maximum 219 kW and a different kg/kW reference. This separate split helps avoid directly comparing cars with very different traction and handling behaviour.
• VT3: Turbocharged cars above 215 kW up to 350 kW. This is the highest-performance VT grouping and can include much quicker production-based machinery.

VT Performance indicators: VT performance is heavily shaped by power-to-weight and drivetrain. A front-wheel-drive car may be strong in wet conditions and stable under braking, a rear-wheel-drive car may be better on traction and tyre feel, and an all-wheel-drive car may launch well out of slower corners. Aero remains limited compared with GT cars, so mechanical grip and tyre management are central.

SP capacity classes: SP3, SP4, SP5, SP6, SP7, SP8 and the turbo SP classes

Fan favourite Dacia Logan is part of the SP3T class.

Beyond GT3 and GT4, the SP family includes a wide range of “24h Special” categories split by engine size and technical concept. Naturally aspirated categories include classes such as SP3, SP4, SP5, SP6, SP7 and SP8, while turbocharged machinery appears in classes like SP2T, SP3T, SP4T and SP8T.

This is where you start to see why Nürburgring classing can feel complicated at first. These classes are not simply “GT3 lite”. They are catchments for different race-car builds that do not belong in the homologated headline categories but still need a fair competitive home. Some are very quick, some are more niche, and the exact competitive shape of the class can vary a lot from year to year depending on who enters.

For readers trying to understand the field, the most important takeaway is that SP does not always mean the same thing. SP9 means GT3. SP10 means GT4. But SP3 or SP8T are a different idea: they are technical classes built around the car’s specification rather than a globally marketed customer-racing formula.

• SP3: Over 1,750 cc up to 2,000 cc. Usually smaller, lighter cars with limited power and low-to-moderate aero. Corner speed and reliability matter more than outright straight-line speed.
• SP4: Over 2,000 cc up to 2,500 cc. A step up in engine size, often with more torque and straight-line performance than SP3.
• SP5: Over 2,500 cc up to 3,000 cc. Mid-level special class where performance depends heavily on the base car and build quality.
• SP6: Over 3,000 cc up to 3,500 cc. Larger engines, more speed potential and more serious endurance hardware. Cars need approval as close-to-production-engine vehicles.
• SP7: Over 3,500 cc up to 4,000 cc. Often associated with serious Porsche-style machinery and higher-performance naturally aspirated builds. More power, more braking demand and more tyre load than the lower SP classes.
• SP8: Over 4,000 cc. The largest naturally aspirated SP category. These cars can have strong straight-line performance, but their competitiveness depends on weight, aero efficiency and how well they survive traffic.

Naturally aspirated SP Performance indicators: As you move from SP3 toward SP8, engine capacity generally rises, but that does not automatically mean every higher-numbered car is faster over a stint. Weight, tyre width, aero, fuel use and driver line-up can matter just as much. Downforce is usually lower than SP9 GT3 unless the car is a very developed special build.

• SP2T: Over 1,350 cc up to 1,750 cc turbo. Smaller turbo cars with useful torque, but generally not high-downforce machinery.
• SP3T: Over 1,750 cc up to 2,000 cc turbo. Often one of the more recognisable turbo touring / compact-performance areas of the field.
• SP4T: Over 2,000 cc up to 2,600 cc turbo. More power potential and often stronger straight-line speed than SP3T.
• SP8T: Over 2,600 cc up to 4,000 cc turbo. The biggest turbo SP class, usually for more serious high-output builds.

Turbo SP Performance indicators: Turbo SP cars are usually defined by torque and acceleration rather than huge aero. The bigger turbo classes can be quick in a straight line, but they still need to be balanced by weight, tyre capacity, braking and fuel use. Turbocharged cars are also visually marked with a blue “T” sticker, which helps spectators identify them.

AT classes: alternative fuels, but not alternative ambition

AT1, AT2 and AT3 are the Nürburgring’s classes for alternative-fuel entries. These are admitted on application and then performance-assigned via BoP. In other words, the fuel concept is what makes them special, but their competitive placement is still controlled so they fit the wider race safely and fairly.

That is why AT matters even if there are only a handful of cars. It is the category where the series creates space for technologies such as ethanol-based fuels, biofuels or synthetic fuels. In some years, this class sits quietly in the background. In others, it becomes one of the most talked-about technical stories in the race.

• AT1: The highest-performance alternative-fuel grouping. This is where an alternative-fuel car can overlap with top-class pace if the base car is strong enough.
• AT2: Mid-level alternative-fuel grouping. The exact performance depends on the approved vehicle concept and its BoP allocation.
• AT3: Lower-performance alternative-fuel grouping. Usually more about proving the concept and racing within its class than challenging the fastest cars overall.

Performance indicators: AT cars are assigned by BoP rather than a simple displacement ladder. Power, weight, fuel capacity and stint length are especially important because the fuel concept can change how the car performs over a long race. Downforce depends on the base car: an alternative-fuel GT3-style entry may have high aero, while a more production-based AT car may have much less.

Because AT is application-based and BoP-assigned, the class can look very different from one entry list to the next.

H classes: older cars, classic feel

The H classes are for older vehicles built up to the cut-off defined in the regulations. They are split broadly into H2 and H4, again using engine-size logic. These cars bring a different visual and mechanical flavour to the paddock and help preserve one of the Nürburgring’s defining characteristics: variety.

They are rarely the reason a first-time fan tunes in, but they are often the reason people fall in love with the event once they understand it. Seeing older, less homogenised race cars sharing the same enormous, demanding circuit as modern GT3 machinery is part of what makes the NLS / 24h ecosystem feel unlike almost any other major endurance event.

• H2: Up to 2,000 cc. Smaller historic-style cars with modest power and low aero.
• H4: Over 2,000 cc up to 6,250 cc. Much wider performance spread, from heavier older touring cars to more powerful classic-style machinery.

Performance indicators: Expect low downforce, older chassis behaviour and a bigger emphasis on mechanical sympathy. These cars can be quick in the right hands, but their appeal is as much about sound, variety and history as pure lap time.

Which classes are fastest, and which are easiest to follow?

If you only want a practical fan cheat sheet, this is the simplest way to read the field:

• Overall win focus: SP9 first, then keep an eye on SP-Pro, SP-X and top AT1 stories depending on the entry.
• Best class for tight, like-for-like competition: Cup 2, Cup 3 and the BMW one-make classes.
• Best class for fans of road-car relevance: TCR, V and VT.
• Best class for spotting technical variety: SP-X and AT.

There is no perfect single order from fastest to slowest because some class families overlap in different ways. Still, as a rough guide, the field normally builds from SP9 and the other top specials at the front, through GT4, Cup and TCR-style machinery in the middle, and then into the broader production, historic and grassroots-style categories further down the order.