The Audi S4 is a high-performance sports sedan that has been a favorite among car enthusiasts for many years. One of the most common questions that Audi S4 owners ask is how much horsepower their car is producing on the dyno. In this article, we will take a look at everything you need to know about the Audi S4 stock dyno, including what it is, how it works, and what kind of numbers you can expect.
What is a Dyno?
A dyno, short for dynamometer, is a machine that measures the power output of a vehicle's engine. It works by placing the car's wheels on a set of rollers, which are connected to a computer that measures the amount of force the engine is producing. The dyno can measure a variety of metrics, including horsepower, torque, and even air/fuel ratios.
Types of Dynos
There are two main types of dynos: chassis dynos and engine dynos. Chassis dynos measure the power output at the wheels, while engine dynos measure the power output directly from the engine. Chassis dynos are more common because they are easier to use and less expensive to operate. However, engine dynos are more accurate because they measure the power output directly from the source.
How Does a Dyno Work?
When a car is placed on a dyno, the wheels are strapped down to a set of rollers. The dyno operator then revs the engine to a certain RPM and holds it there for a few seconds. The dyno measures the amount of force the engine is producing at that RPM and calculates the horsepower and torque figures based on that data. The process is repeated at different RPMs to get a complete power curve for the engine.
Interpreting Dyno Results
Dyno results can be a bit confusing if you're not familiar with the terminology. The most important figure is horsepower, which is the amount of power the engine is producing at a given RPM. Torque is also important, as it measures the twisting force the engine is producing. The power curve is also important, as it shows how the engine's power output changes throughout the RPM range. A smooth, flat power curve is generally desirable, as it indicates a well-tuned engine.
Audi S4 Stock Dyno Numbers
So, what kind of numbers can you expect to see from an Audi S4 on the dyno? The answer depends on the year and model of your car, as well as any modifications you may have done. However, here are some rough estimates for stock Audi S4 dyno numbers:
The B5 Audi S4 (1997-2001) produced around 250-260 horsepower and 258-295 lb-ft of torque at the crank. On a chassis dyno, this equates to around 200-220 horsepower and 220-240 lb-ft of torque at the wheels.
The B6/B7 Audi S4 (2003-2008) produced around 340-350 horsepower and 302-325 lb-ft of torque at the crank. On a chassis dyno, this equates to around 290-300 horsepower and 270-290 lb-ft of torque at the wheels.
The B8/B8.5 Audi S4 (2009-2016) produced around 330-350 horsepower and 325-350 lb-ft of torque at the crank. On a chassis dyno, this equates to around 280-300 horsepower and 270-290 lb-ft of torque at the wheels.
The B9 Audi S4 (2017-present) produced around 354 horsepower and 369 lb-ft of torque at the crank. On a chassis dyno, this equates to around 300-320 horsepower and 310-330 lb-ft of torque at the wheels.
Conclusion
The Audi S4 is a high-performance sports sedan that has been a favorite among car enthusiasts for many years. If you're curious about how much power your Audi S4 is producing on the dyno, there are a few things you should know. Dynos are machines that measure the power output of a vehicle's engine, and there are two main types: chassis dynos and engine dynos. Stock Audi S4 dyno numbers can vary depending on the year and model of your car, as well as any modifications you may have done. However, with these rough estimates, you should have a good idea of what kind of numbers to expect.
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