There are so many features and accessories that make each vehicle brand and model unique. We can name quite a few that makes Volkswagen and Audi vehicle’s stand out.


Audi Slogan:

Firstly, we all know that the slogan of Audi is, “Vorsprung durch Technik, which is by the way celebrating it’s 50 years of existence. The slogan was only developed 30 years after Audi released its first vehicle and the slogan was given by Sir John Hegarty.

Original Audi Slogan
Original Audi Badge (Logo)

What does The Audi logo mean?

Most of us love the idea of owning 4 rings, even if it is on the back of an Audi. The four interlocking rings represent the four different companies that merged in 1932 to create what was then called the ‘Auto Union.’ The four companies were Audi, DKW, Horch and Wanderer.

The Volkswagen logo

The Volkswagen logo is known for its unique blue colour. This specific blue colour symbolizes excellence, reliability and class. The white colour in the logo depicts nobility, purity and charm. The Volkswagen logo was designed by Nikolai Borg in 1939.

Original Volkswagen Logo

Have you ever noticed something other than just the Audi or Volkswagen badge at the back of their vehicles? Have you seen the digits and letters and wondered what is the actual meaning of it? Let’s explain it.

How Audi and Volkswagen Name their Cars

Audi follows a naming format that some people might find difficult to understand. By using letters and number digits, Audi has a meaning for each and every one.

Base models have an “A” designation, for example the Audi A1, A3, A4, etcetera.  Sportier luxury models get a “S”, for an example the Audi S3, S4, etcetera.  The sportiest “RennSport” models get an “RS”, for example the Audi RS3, RS4, etcetera.  Audi uses “Q” for its SUV line, for an example the Audi Q3, Q5, Q7, etcetera. The TT and R8 exist outside that nomenclature. The Audi TT takes its name from the successful motor racing tradition of NSU in the British Isle of Man TT (Tourist Trophy) motorcycle race. The R8 is the first generation of the R8 sports car developed and manufactured by German automobile manufacturer Audi.  And finally, Audi employs “E-Tron” for its electric cars.

Audi’s current vehicle lineup is symbolized by a single letter, followed by an accenting number, which represents both the class and type of vehicle. But suddenly there are more and more existing digits and letters which can be confusing. Every new Audi will include a number ranging from 30 to 70 on its backside. Two numbers will now be added to the back of every Audi vehicle alongside the current model designation and engine type. The numbers will depend on power output, and will range from 30 to 70. 

At the top of the range, the number “70,” will signify Audi’s performance class, with models producing more than 536 hp (400 kW). Each of the numbers will be placed alongside their specific badges, for an example next to the TFSI.

The chart below explains the new nomenclature:

30 = 109-128 hp (81-96 kW)
35 = 147-160 hp (110-120 kW)
40 = 167-201 hp (125-150 kW)
45 = 226-248 hp (169-185 kW)
50 = 281-308 hp (210-230 kW)
55 = 328-368 hp (245-275 kW)
60 = 429-455 hp (320-340 kW)
70 = 536+ hp (400+ kW)

New naming technique for Audi: 55 TFSI
New naming technique for Audi: 45 TFSI

The clarity and logic of structuring the designations according to power output makes it possible to distinguish between the various performance levels."

Dr. Dietmar Voggenreiter, Board of Management Member for Sales and Marketing at AUDI AG.

The manufactures agreed that the number combinations help to identify Audi’s product range better, especially those with electric and hybrid powertrains. 

The changes will begin with the new Audi A8, which will be available beginning this fall. The two six-cylinder engines will be predesignated with “50 TDI” and “55 TFSI” badges, representing power outputs of 286 and 340 hp (383 and 455 kW) respectively. In the months that follow, all Audi models will be launched with the new designation.

Other badge meanings of Audi and Volkswagen:

Not only are the model and power range displayed at the back of these vehicles, but we can distinguish the different  engines that are in the vehicles by simply checking the letter badges and by knowing exactly what it means.

Audi 2.0 FSI Engine


FSI stands for “Fuel Stratified Injection.’ The FSI engine offers a better combination of fuel and air, with the mixture forced into a more intense cylindrical movement by a special intake geometry. These engines do not have turbos. and it was part of the first range of engines Audi and Volkswagen produced.


TSI stands for “Turbocharged Stratified Injection.” It essentially indicates that the engine is turbocharged. It refers to a series of three, four, and six-cylinder turbocharged petrol engines used in a variety of VW Group cars, including models such as the Skoda Octavia, SEAT Tarraco, Volkswagen Golf and the latest Volkswagen Touareg SUV. The TSI engine range is a direct evolution of the older TFSI (Turbo Fuel Stratified Injection) engines. Both are turbocharged but the newer TSI engines feature reliability improvements, including a switch to a timing chain from a cam belt. 

The TSI engines are also lighter by having a better fuel injection system and cooling improvements. These changes mean they produce more power and more torque lower in the rev range but return lower fuel consumption and CO2 emissions figures. 

Volkswagen Polo TSI
Audi 2.0 TDI Engine


TDI stands for “Turbocharged Direct Injection.” It is a marketing term used by the Audi Group for its turbocharged diesel engines that have an intercooler in addition to the turbo compressor. The fist TDI engine was produced in 1989 in the Audi 100 Sedan. From 2006 until 2014, Audi successfully competed in the LMP1 category of motor racing using TDI engine-powered racing cars.

Fact: The TDI engine doesn’t need a spark plug to kick things off.

In a diesel engine, the highly compressed air (compression ratios of 18 to 25) is introduced into the combustion chamber, this compressed air increases the temperature of diesel fumes or vapors to kindling point, and thus the mixture self-ignites.


TFSI stands for “Turbo Fuel Stratified Injection.”  This is Audi’s most utilised engine. The turbo aspect is denoted by fuel being pressure-injected into the combustion chamber of the engine to create an instant charge. Injecting fuel directly into the engine removes heat from the intake air, which creates a higher compression, improving efficiency and responsiveness and removing knock.

Golf GTI Grill Badge


GTI stands for “Grand Touring Injection.” Volkswagen uses this term for its direct fuel injection system. The first GTI engine was used in 1976 in the Volkswagen Golf, over 40 years ago. Grand Touring Injection is a type of direct fuel injection and it was developed and tested in Gran Turismo Italian models, which were designed to power long-distance journeys without ever sacrificing performance or comfort. In its original form, the GTI had a close-coupled fuel particulate filter. If the particulate filter is fed directly after flowing through the turbocharger, the exhaust gas will be fed into it. Thanks to its special coating, it is a catalytic converter in the same way as conventional catalytic devices.

"R"- Line

(R-Line) What does the R stand for here? Racing of course. The Golf R is a performance model, while the R-Line options offer sportier styling that are meant to remind you of the track. These engines are mostly used for racing and on-track driving.

Golf R-Line Grill Badge
Quattro Badge on Audi S4


Quattro means four in Italian, and is a registered trademark of Audi. It is a legendary Four-Wheel drive technology or system used by Audi on some of its vehicles, where the optimal power is delivered to each wheel as needed to deliver superior handling and phenomenal grip, and contributes to better traction control.

When buying a new car, it is important to know about these features and to make sure you know exactly what you are buying, in terms of the type of engine and power capacity. 

VAG Spec Centre is your number one Audi and Volkswagen repair centre. We will take care of your Audi or Volkswagen regardless the model, engine type and age.

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