Audi S3 (2020-present): dimensions and boot space

Every measurement you need to know for the Audi S3, covering length, width and height and boot size

Matt Rigby
Oct 28, 2021

The Audi S3 is available as either a practical five-door hatchback or a sharp-suited four-door saloon. It delivers punchy performance and handling to rival the abilities of much more expensive sports cars thanks to a powerful turbocharged engine and four-wheel-drive. At the same time it also provides plenty of space for passengers and luggage. It’s also compact enough to feel handily manoeuvrable in tight car parks or narrow city streets.

Other hot hatches that follow a similar recipe are the Volkswagen Golf R, the Mercedes-AMG A35 and the BMW M135i. All offer four-wheel-drive and near-identical 300hp-plus power outputs. The BMW and the Mercedes are even available as saloons, too.

The Audi S3 we’re focusing on here was launched in 2020. Its predecessor was offered in three-door and five-door Sportback forms as well as a saloon, but this car is available as a five-door Sportback or saloon only.

Although noticeably longer than the old three-door car, compared with the older pre-2020 five-door Sportback model the new one is barely any different, meaning very little change in the available space for front or rear passenger or their luggage - but that’s no bad thing, as the older S3 was a perfectly practical car for its size.

You can find examples of the current version of the Audi S3 Sportback or S3 Saloon from  per month with PCP finance. Read on for more details about the S3's dimensions and boot space.


Audi S3 dimensions

At 4.35 metres long, the S3 Sportback is only a couple of centimetres longer than the BMW M135i, but it is a noticeable 8 centimetres shorter than the Mercedes A35. This is mostly lost in rear-seat space, but it’s not enough for the S3 to feel more cramped than the Mercedes, especially as Audi’s engineers focused on adjusting the angle and position of the rear seat backs to make the most of the available space.

Looking at width, both the A35 and the M135i are a couple of centimetres narrower, but this is only at kerb height. The comparison is reversed when you consider the door mirrors, as the design of the A3 puts the mirrors further towards the centre of the car than on the other two models, making it more slender than both when you take this into account.

Audi S3 Sportback4,351mm1,816mm1,438mm


The S3 Saloon adds around 20 centimetres to the overall length over the hatchback, but this is all at the rear of the car - the boot is longer, but the overall volume and the space for front and rear occupants is no different than for the Sportback hatchback.

Audi S3 Saloon4,504mm1,816mm1,415mm

Audi S3 boot space

The S3 Sportback serves up a reasonable 325 litres of space, which is pretty much what you’d expect for this size of car. The Mercedes-AMG A35 does offer a more substantial 370 litres, mind you, and the Ford Focus ST 375 litres.

So the S3’s load space is perfectly respectable for this type of car, though models with larger boots are available, plus it gives you 1,145 litres of room when you fold the rear seats down.

Boot spaceSeats upSeats down
Audi S3 Sportback325 litres1,145 litres


The S3 Saloon gives you the same 325-litre boot volume with the rear seats in place, though its design and layout is less flexible than the hatchback tailgate of the Sportback model, thanks to its smaller boot opening.

Boot spaceBoot space
Audi S3 Saloon325 litres


Audi S3 towing capacity

Unfortunately the S3 is unable to tow, as the design of the exhaust and rear bumper means it’s not possible to connect a tow bar. Regular Audi A3s, meanwhile, are rated for between 1,500kg and 1,800kg for a braked trailer, however, which isn't bad for a car of this size and weight.

If you really want an effective tow car, however, something larger and heavier such as an Audi A6, or Q5 or Q7 SUV would make more sense and should be able to cope with heavier trailers or caravans.

Audi S3 weight

The kerb weight of a car tells you how much it's likely to weigh in everyday use. This means the figure takes into account all the fluids in the engine, a tank of fuel and an extra 75kg to represent a driver.

The weight of any model range varies depending on the particular model and options fitted. Equipment such as four-wheel-drive and automatic gearboxes add weight, for example, as do the battery packs required in plug-in hybrid cars. Typically, the heavier a car is, the less agile it will feel around corners and the more fuel it will use.

Audi S31,575kg - 1,580kg



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