What Do BMW Letters and Numbers Stand for? | Indy Auto Man, Indianapolis

Table of Contents

BMW: Series and Models
How do BMW model numbers really work?
What’s the deal with “xDrive” and “sDrive”?
Petrol, Diesel, and Hybrid Designations
xDrive Vs. sDrive
Additional Options

Most BMW buyers may intuitively understand that the 3 Series is smaller (and therefore cheaper) than the 5 or 7 Series. However, all these letters, numbers, and names may seem confusing. BMW (Bayerische Motoren Werke, which translates to the Bavarian Engine Works Company) also uses several proprietary terms, such as Gran Coupe, xDrive, and M Sport Line, which may require some orientation for those less familiar with the brand. Today, we reveal the meaning of these designations to make your choice of a used BMW model easier.

BMW: Series and Models

BMW currently offers ten different series in Indiana dealerships, each with its unique models. The even-numbered series, such as the 2-series, 4-series, and 6-series, are known for their sportier coupe style. On the other hand, the odd-numbered series, like the 3-series, 5-series, and 7-series, include sedan-style models.

Here is a breakdown of some of the key models within each series:

2 Series: The smallest two-door model available as a coupe or convertible.
3 Series: A compact four-door sedan, sports wagon, or Gran Turismo.
4 Series: A compact coupe-style model available as a two-door convertible, coupe, or four-door Gran Coupe.
5 Series: A four-door mid-size sedan or Gran Turismo.
6 Series: A mid-size two-door model available in a coupe, convertible, four-door Gran Coupe, or ALPINA Gran Coupe.
7 Series: A full-size four-door sedan or ALPINA sedan.

In addition to the numbered series, BMW also offers four groups of vehicles designated by letters:

X Models: SUVs and crossovers.
Z4: A two-door roadster.
M Models: High-performance versions of various BMW models.
BMW i: A line of electric and hybrid cars.

BMW manufacturer also offers branded vehicle types such as Gran Coupe, Gran Turismo, and ALPINA models. These include variations like the four-door Gran Coupe and the high-performance ALPINA variants.

Overall, BMW's lineup consists of a diverse range of vehicles designed to cater to different preferences and needs:

The Gran Coupe is a four-door version of the coupe, maintaining the sleek design of the two-door model while offering additional space. Both the 4 Series and 6 Series are available in Gran Coupe versions.
The Gran Turismo is a four-door sedan with a raised driving position and a spacious interior. This model is offered in the 3 Series and 5 Series.
ALPINA Sedan and ALPINA Gran Coupe - ALPINA Automobiles operates independently from BMW. The ALPINA variants of the 6 Series and 7 Series are high-performance versions similar to Mercedes-AMG models compared to standard Mercedes-Benz vehicles. Despite being separate entities, ALPINA vehicles are manufactured in the BMW facilities using standard production lines.

How do BMW model numbers really work?

When shopping for a BMW, you’ll notice a lot of numbers—like 320i, 530e, or 740Li. The first number tells you which series you’re looking at (bigger number, bigger car), while the next two used to mean engine size, though now they point more toward overall performance. Think of higher numbers as bringing more power and features—so a 340i generally beats a 320i in both speed and specs.

What’s the deal with “xDrive” and “sDrive”?

If you see “xDrive” on a BMW badge, you’re looking at all-wheel drive—perfect for grip in tough weather. “sDrive,” meanwhile, means you’re getting either classic rear-wheel drive or, on a few models, front-wheel drive. It’s just BMW’s way of spelling out how your new car puts power to the ground.

What are the real differences between M Sport and ALPINA models?

BMW’s M Sport packages add some racier style and handling tweaks—think sportier seats or stiffer suspensions. But if you come across ALPINA, you’re looking at a unique partnership: ALPINA models are hand-finished, high-performance BMWs with one-of-a-kind touches and extra luxury. They’re rare, refined, and very fast.

Is it true that BMWs cost more to maintain?

Yes, BMW ownership does often mean paying a bit more for upkeep than the average car. Parts and specialized service can add up, especially as the miles climb. Still, many owners feel it’s worth the added peace of mind and top-tier driving experience—especially with new models often coming with scheduled maintenance included for several years.

Petrol, Diesel, and Hybrid Designations

Traditionally, the first letter following the vehicle number indicated whether it was a petrol model with "i" for fuel injection or a diesel model with "d." However, with the introduction of hybrid engines in the 3, 5, and 7 series sedans, BMW now refers to them as the ActiveHybrid 3, ActiveHybrid 5, and ActiveHybrid 7.

xDrive Vs. sDrive

The designation xDrive or sDrive indicates whether a vehicle has part-time all-wheel drive (sDrive) or full-time all-wheel drive (xDrive). For example, the all-wheel drive version of the 328i is known as the 328i xDrive Sedan.

In addition to this, X models are available with both part-time and all-wheel drive options. BMW models like the X1, X3, X5, and X6 come in variants such as X5 sDrive35i or X3 xDrive28d, where the former typically has a petrol engine and the latter a diesel engine.

Additional Options

BMW offers various line variants on specific models to enhance the standard trim's appearance. These are specialized configurations sometimes only available as part of a particular line. Some of the available line variants include:

Luxury Line: This variant signifies luxury trim enhancements for wheels and the interior.
xLine: The xLine collection, available on select X models, offers diverse features beyond the standard trim.
Sport Line: This variant adds upgraded wheels, a sports steering wheel, and seats.
M Sport Line: In addition to the M models mentioned earlier, BMW provides the M Sport Line for select vehicles. This line includes features like M wheels, an M steering wheel, a sports dashboard, and an M aerodynamics kit. Additionally, unique color options may be available with the M Sport Line.

At Indy Auto Man Indiana car dealerships, you will find a rich selection of the most popular used BMW models, from sports sedans to luxurious SUVs. Our experienced sales assistants will answer all your questions and help you make the right choice. Browse our inventory online and schedule a test drive of your favorite car today.