What does TFSI mean?

When it comes to Audi TFSI petrol engines, we’ve got you covered. Find out all you need to know here.

Audi TFSI engine

Buy a new or used Audi and you won’t just get the top-level name that comes with it like the ‘Audi A3’, you’ll also get the ‘TFSI’ bit, which comes after it too. By knowing what these labels and abbreviations mean, you’ll be able to make sure that you get the engine that you want and that’s where we come in. It’s always handy to know what the manufacturers mean with their shorthand.

With the TFSI badge, you’ll find this on every petrol car that Audi sells and diesels with TDI, but what does it mean?

What does TFSI stand for?

TFSI stands for Turbocharged Fuel Stratified Injection and is used to let people know that the engine is a turbocharged petrol unit. Before this, before Audi got in with the fashion, these would have just been FSI engines, because they didn’t have turbochargers.

Powering a high output and optimum engine response, while reducing emissions and greater fuel efficiency, the TFSI engine is available in 4-cylinder, 6-cylinder and V-8 variations.

Since Audi got up to date, Audi models come with either TFSI or TDI and you’ll also find that they will have a number in front of this badge ranging from 25 to 70. These numbers simply show how much power the car has. It’s got nothing to do with the engine size or anything like that, sorry to disappoint.

Audi reckons that it allows for easier comparison between your petrol, diesel and electric cars. If you're buying an Audi car brand new, you have the option of either having the badge left on, all depends on what tickles your fancy.

Audi TFSI e engine

If you ever notice a little ‘e’ on an Audi TFSI engine, then you’ll need to know that this isn’t just a normal petrol engine. This means that the car is a plug-in hybrid (PHEV), and you’ll see this on your Audi Q5 TFSI e or any other PHEV model.

In most cases, you’ll find that a full battery charge will give you at least 30 miles or range, lower running costs and better fuel efficiency, so a good all-rounder really.

Top of the TFSI mountain

At the top is the 4.0-litre V8, which powers the Audi A8. Producing an impressive 450 horsepower and 325 ft-lbs of torque, this twin-turbo engine, paired with an 8-speed shiftable automatic transmission, and ‘Cylinder on Demand’ technology, isn't this just a beast of a motor! This means that when operating at part load, four of its cylinders will be in play.

You’ve also got your additional features too like Active Noise Control and engine mounts, which play a key part in reducing noise and vibration within the cabin.

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