Audi Engines Explained!

Audi Engines Explained!
16 May 2019
By Ross Wild
Audi is known throughout the world for their creativity, impeccable performance and classy interiors in their vehicles. They have made their way into the premium market and offer a wide range of different vehicles to choose from. However, as amazing as their vehicles are, something which caused controversy a couple of years ago was the way in which Audi changed the way that they resemble their engine sizes. Previous to the change and like most other manufacturers, a 1.4L Audi, for example, would have a “1.4” sticker on the rear of the vehicle; however, they introduced 25,30,35 TFSI/TDI in the new Audi engines. This left many people throughout the world wondering "what do the new Audi numbers mean?" 

It turns out that it is simply an indication of the power of the vehicle itself and each number, ie (25), means that a cars BHP is in a certain threshold. We can presume that Audi has made this change to put more of a focus on the actual raw power of their vehicle's instead of its engine size. 


Available Engines, Specifications and Which Models?

Below, we have listed all of the new available engines within Audi's range and included their fuel type, the engine size it corresponds with, its brake horsepower range and the available models for each engine. Check them out below!


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25 TFSI

Fuel: Petrol

Engine Size: 1.0L

BHP: Under 107 BHP

Quickest 0-62: A1 (7.7 Seconds)

Top Speed: 118 mph (Based on A1 S-Line)

Example MPG (Combined): N/A

Models with this engine: A1


30 TFSI

Fuel: Petrol

Engine Size: 1.0L

BHP: 107-127 BHP

Quickest 0-62: 9.9 Seconds (Based on A3 Sportback)

Top Speed: 128 mph (Based on A3 Sportback Black Edition)

Example MPG (Combined): 55.4 mpg (A3 Saloon Black Edition)

Models with this engine: A3 Sportback, A3 Saloon, A1


30 TDI

Fuel: Diesel

Engine Size: 1.6L

BHP: 107-127 BHP (Check)

Quickest 0-62: 10.4 Seconds (Based on A3 Sportback) 

Top Speed: 127 mph (Based on Audi A3 Sportback Black Edition)

Example MPG (Combined): 64.2 mpg (A3 Saloon Black Edition)

Models with this engine: A3 Sportback, A3 Saloon, Q2


35 TFSI - A1 and A3 (1.5L) A4 and A5 (2.0L) 

Fuel: Petrol

Engine Size: 2.0L, 1.5L

BHP: 145-159 BHP

Quickest 0-62: 7.7 Seconds ( based on an A1), 8.9 Seconds ( based on an A5 Coupe)

Top Speed: 137 mph (Based on A1 S-Line)

Example MPG (Combined): 54.3 mpg (A1 S-Line)

Models with this engine: A1, A3 Sportback, A3 Saloon, A3 Cabriolet, A4 Saloon, A4 Avant, Q3, Q2, A5 Coupe, A5 Sportback


35 TDI 

Fuel: Diesel

Engine Size: 2.0L, 1.5L

BHP: 145-159 BHP

Quickest 0-62: 8.1 seconds (based on an A3 Sportback), 9.1 seconds (A5 Sportback)

Top Speed: 135 mph (Based on 35 TDI Black Edition)

Example MPG (Combined): 62.8 mpg (A3 Sportback Sport)

Models with this engine: A3 Sportback, A3 Saloon, A4 Saloon, A4 Avant, A5 Sportback, Q2, Q3


40 TFSI

Fuel: Petrol

Engine Size: 2.0L

BHP: 165-198 BHP

Quickest 0-62: 6.5 Seconds ( based on the A1 Competition) 

Top Speed: 150 mph (Based on Audi A3 Saloon Black Edition Quattro)

Example MPG (Combined): 47.9 mpg (A4 Saloon S-Line)

Models with this engine: A1, A3 Sportback, A3 Saloon, A3 Cabriolet, A4 Saloon, A4 Avant, A5 Sportback, A5 Coupe, A5 Cabriolet, TT Coupe, TT Roadster, Q3


40 TDI

Fuel: Diesel

Engine Size: 2.0L

BHP: 165-198 BHP

Quickest 0-62: 8.3 Seconds (A7 Sportback), 6.8 seconds (A3 Sportback) 

Top Speed: 150 mph (Audi A4 Black Edition)

Example MPG (Combined): 62.8 mpg (A4 Saloon Sport)

Models with this engine: A3 Sportback, A3 Saloon, A4 Saloon, A4 Avant, A4 Allroad, A5 Sportback, A5 Coupe, A5 Cabriolet, A6 Avant, A6 Saloon, A7 Sportback, A3, Q5


45 TFSI

Fuel: Petrol

Engine Size: 2.0L

BHP: 223- 244 BHP

Quickest 0-62: 5.5 seconds (based on an Audi TT Roadster)

Top Speed: 155 mph (Audi A5 Black Edition)

Example MPG (Combined): 43.5 mpg (A6 Saloon Quattro Sport)

Models with this engine: A4 Saloon, A4 Avant, A4 Allroad, A5 Sportback, A5 Coupe, A5 Cabriolet, A6 Saloon, A7 Sportback, TT Coupe, TT Roadster, Q3, Q5


50 TDI

Fuel: Diesel

Engine Size: 3.0L

BHP: 278-304 BHP

Quickest 0-62: 5.9 seconds (Audi A8 Saloon)

Top Speed: 155 mph (Audi A7 Sportback S Line) 

Example MPG (Combined): 50.4 mpg (A6 Saloon Quattro S-Line) 

Models with this engine: A4 Saloon, A4 Avant, A4 Allroad, A5 Sportback, A5 Coupe, A5 Cabriolet, A6 Avant, A6 Saloon, A7 Sportback,A8 Saloon, Q7, Q8


55 TFSI

Fuel: Petrol

Engine Size: 3.0L

BHP: 324-363 BHP

Quickest 0-62: 5.7 seconds (Audi A8 Saloon) 

Top Speed: 155 mph (Audi A6 Avant Black Edition)

Example MPG (Combined): 35.8 mpg (A8 Saloon Quattro S-Line) 

Models with this engine: A6 Avant, A6 Saloon, A7 Sportback, A8 Saloon, Q8


Which Engine is Best For You? 

It's no lie that Audi's new naming system is quite confusing; but once you realise that it is simply an indication of power as opposed to engine size, then the new numbering system is actually quite self-explanatory. However... you may be wondering "which engine is best for me?" as you may place more importance on acceleration or economy. For this problem, we have created the tables below to give you an indication on which new Audi engine may be best suited to you: 

 PETROL-TFSI
- ENGINE
Fastest Accelerating (0-62 mph) 45 TFSI (5.5 Seconds)- Audi TT
Highest Top Speed 45 TFSI/ 55TFSI - 155 mph Cap
Best Combined Fuel Economy 30 TFSI- (55.4 mpg A3 Sportback)
BHP 55 TFSI (324-363 BHP)


 DIESEL- TDI
- ENGINE
Fastest Accelerating (0-62 mph) 50 TDI- (5.9 Seconds)- Audi A8
Highest Top Speed 50 TDI- 155 mph Cap
Best Combined Fuel Economy 30 TDI- (64.2 mpg)- A3 Sportback
BHP 50 TDI- 278-304 BHP


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What about the RS and S models?

The S and RS models are the performance variants of the standardised vehicles which have much more powerful engines and incredible technology to go along with it. It turns out that Audi's new engine names don’t actually apply to any S or RS models. To take the Audi S3 for example; the S3 simply features ‘S3’ on the rear and the same applies to an RS5 and so on.

Audi Rs and S

Thank you for reading our latest blog explaining Audi engine names, we hope you have a better understanding of what they mean now. If you enjoyed this one, be sure to check out some of our other latest blogs and related pages!


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