Audi A3 (2020-present): dimensions and boot space

Every measurement and capacity you need to know about for the Audi A3 Sportback; boot size, length, width, height and interior dimensions

Matt Rigby
Aug 31, 2021

The A3 Sportback is Audi’s medium hatchback. There are plenty of other hatchbacks to spend your money on, but if you want a smart, upmarket look, and a robust-feeling car with a premium badge on the nose, then the Audi A3 certainly warrants your attention. It’s available as a hatchback and a saloon, but we’re concentrating on the more common hatchback version here.

Other options if you’re after an upmarket medium hatchback include the Mercedes A-Class and the BMW 1 Series, which are almost identical in size inside and out. There are much more affordable mainstream rivals that offer more boot space, however - such as the Peugeot 308 and Kia Ceed - plus rivals that are more spacious in general - like the Skoda Octavia.

The version of the Audi A3 that we’re focusing on here was launched in 2020. Its predecessor was offered in three-door and five-door 'Sportback' hatchback forms, but this car is available as a five-door Sportback 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 and rear passengers or their luggage - but that’s no bad thing, as the older A3 was a perfectly accommodating car for its size.

You can find examples of this version of the Audi A3 Sportback from £464 per month with PCP finance. Read on for more details about its dimensions and boot space.


Audi A3 Sportback dimensions

At 4.34 metres long, the A3 is only a couple of centimetres longer than the BMW 1 Series, but it is a noticeable 8 centimetres shorter than the Mercedes A-Class. This is mostly lost in rear-seat space, but it’s not enough for the A3 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 Mercedes and the BMW are a couple of centimetres narrower, but this is only at kerb height. It’s reversed when you take the door mirrors into account as the design of the A3 puts the mirrors further inboard than on the other two cars, making it more slender than both when you take this into account.

Audi A3 Sportback4,343mm1,816mm1,425mm


Audi A3 Sportback boot space

A volume of 380 litres seems to be a bit of a key number for this type of car. It’s the amount of boot space you’ll find - measured up to the load cover - in the Audi A3, Volkswagen Golf, Seat Leon and BMW 1 Series.

The Mercedes A-Class only serves up 370 litres, mind you, and the Ford Focus 375 litres. Opt for a Kia Ceed or a Peugeot 308 and you’ll be treated to 395 litres and 470 litres of space respectively. All of these cars offer a decent amount of room for most families.

So the A3’s load space is perfectly respectable for this type of car, plus it gives you 1,200 litres of room when you fold the rear seats down. Speaking of folding rear seats, Technik trim levels offer a 60:40 split folding seats - meaning that there are two halves to the seat which can be folded individually - while Sport models and above bring the more flexible option of 40:20:40 folding - meaning that the seat is split into three parts.

A word of warning, though - the batteries for the plug-in hybrid versions eat into boot space to the tune of 100 litres, so bear that in mind if you're considering one of these.

Boot spaceSeats upSeats down
Audi A3 Sportback380 litres1,200 litres

Audi A3 Sportback towing capacity

Family hatchbacks don’t tend to be the go-to model if you’re looking to tow, but the A3 is rated at between 1,500kg and 1,800kg for a braked trailer, so the A3 has some capacity in that area, making it a good medium hatchback option. 

Given that it is not recommended to tow anything that weighs more than your car’s kerb weight, however, in practical terms you’ll be limited by this figure, since the kerbweight of the Audi A3 varies from 1,220kg to 1,560kg depending on the model.

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

Towing capacityBraked
Audi A3 Sportback1,500kg - 1,800kg

Audi A3 Sportback weight

The kerb weight of a car lets you know how heavy it’s likely to be in the real world. This means that all the fluids in the engine, a tank of fuel and an extra 75kg to represent the weight of a driver are included.

The weight of any range of cars will vary depending on the specification of the particular model. Four-wheel-drive and automatic gearboxes add weight, for example, as does the battery pack required for a plug-in hybrid car. In general, the heavier a car is, the less nimble it will feel and the more fuel it will use, but this can be offset to some extent with suspension settings and more engine power.

Audi A3 Sportback1,220kg - 1,585kg



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