Audi A3 Dimensions — Length, Width & Boot Size

Audi A3 Dimensions

4.34 m long, 1.82 m wide and 1.43 m tall, with a 380 litres boot and a 1,340 kg kerb weight — and what those numbers mean for a UK garage and a marked parking bay.

Length

4.34 m

Width

1.82 m

Height

1.43 m

Boot

380 L

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Audi A3 size and weight in full

Figures for the most common UK specification of the Audi A3.

Audi A3 exterior dimensions, kerb weight and capacities.
Measurement	Audi A3	What it covers
Length	4,343 mm (4.34 m)	Nose to tail, excluding a towbar
Width	1,816 mm (1.82 m)	Body only — door mirrors are not included
Height	1,425 mm (1.43 m)	Unladen, roof bars and aerial excluded
Kerb weight	1,340 kg	Car plus fluids, no occupants or luggage
Boot capacity	380 litres	Manufacturer-quoted, rear seats up
Fuel tank	50 litres	Usable capacity varies with the fuel-light reserve
Doors	5	—
Seats	5	—
Body type	Hatchback	—

Representative figures for the most common UK specification. Where a nameplate spans several generations these reflect the version most common on UK roads, so treat them as a shortlisting guide and check the handbook for a specific car. Last reviewed August 2026.

Will a Audi A3 fit your garage or parking space?

Almost nobody searches for a car's length out of curiosity. They are working out whether it clears a garage door, whether the doors will open in a supermarket bay, or whether it will hang over the end of a driveway. Here is the Audi A3 measured against the two spaces that usually decide it.

Standard parking bay (2.40 m × 4.80 m)

Length spare: 46 cm
Gap each side: 29 cm

It sits inside the marked box, so the usual constraint is the car next to you rather than the bay itself. The side gap is reasonable before mirrors are counted.

Typical single garage (2.40 m × 5.00 m inside)

Length spare: 66 cm
Gap each side: 29 cm

The reference garage is the same 2.40 m wide as a marked bay, so the side gap matches — but here it is a wall, not a car that might have parked badly. The length works on paper, but that spare is shared between the door and whatever is stored at the back. Older UK garages are frequently narrower and shorter than this.

Read the width figure carefully

The 1,816 mm above is body width with the mirrors excluded, which is how manufacturers publish it. Mirrors add a meaningful amount on each side — enough to turn a comfortable garage into a folded-mirror one — so treat every side-clearance figure on this page as a best case. The bay and garage sizes are common UK conventions, not regulations: bays are marked differently from car park to car park, and garage interiors vary by decade of build. Measure your own opening before you buy.

Height is rarely the problem in the UK: the tallest car in this dataset is still under 1.75 m, so a height-barrier car park is normally only an issue once a roof box or bike carrier is on top. The Audi A3 stands 1,425 mm unladen without them.

How the Audi A3 compares to other hatchbacks

Averaged across the 22 hatchback models we hold full dimension data for. Averages are computed from the same committed figures shown on every page in this cluster — nothing is modelled or estimated.

Audi A3 versus the average hatchback in the MOT Checkup dimensions dataset.
Measurement	Audi A3	Average hatchback	Difference
Length	4,343 mm	4,173 mm	170 mm longer
Width	1,816 mm	1,769 mm	47 mm wider
Height	1,425 mm	1,461 mm	36 mm lower
Kerb weight	1,340 kg	1,210 kg	130 kg heavier
Boot	380 litres	344 litres	36 litres bigger

Across every model in the dataset the Audi A3 is the 21st longest of 40 and the 21st biggest boot. Within hatchbacks alone it is 8 of 22 on length and 4 of 22 on boot space.

Audi A3 Euro NCAP rating

Size and weight are not a safety rating — crash protection is measured, not inferred from a kerb weight. Since anyone sizing up a car is usually weighing both, here is the tested result: the Audi A3 scored 5 stars when Euro NCAP tested it in 2020.

Adult: 89%
Child: 86%
Pedestrian: 73%
Safety assist: 73%

Euro NCAP protocols tighten over time, so a rating from an earlier year is not directly comparable with a newer one.

Cars a similar size to the Audi A3

Closest on combined length and width, so these occupy roughly the same space on a driveway.

Dacia Duster dimensions

4.34 m × 1.80 m · 445 litres boot

Ford Focus dimensions

4.38 m × 1.82 m · 375 litres boot

BMW 1 Series dimensions

4.32 m × 1.80 m · 380 litres boot

Toyota Corolla dimensions

4.37 m × 1.79 m · 313 litres boot

Volkswagen Golf dimensions

4.28 m × 1.79 m · 380 litres boot

Volkswagen T-Roc dimensions

4.23 m × 1.82 m · 392 litres boot

All car dimensions Check a specific car

Audi A3 dimensions — FAQ

What are the dimensions of a Audi A3?

The Audi A3 measures 4,343 mm long, 1,816 mm wide and 1,425 mm tall — 4.34 m by 1.82 m by 1.43 m. Kerb weight is 1,340 kg and the boot holds 380 litres with the rear seats up. The width figure is the body only: door mirrors are not counted, so the space you actually need on a driveway or in a garage is wider than the number above.

How big is the Audi A3 boot?

The Audi A3 has a 380 litres boot with the rear seats in place. That is 36 litres more than the average hatchback in our data (344 litres across 22 models). It ranks 21 of 40 models we hold dimension data for. Boot volumes are quoted by manufacturers using different methods (VDA versus SAE, seats up versus seats down), so use the figure to shortlist rather than to settle an argument — and if a specific pushchair or dog crate has to fit, take it to the car.

Will a Audi A3 fit in a standard UK garage?

A typical modern UK single garage is about 2.40 m wide and 5.00 m long inside. Against that, the Audi A3 leaves about 66 cm of length spare and roughly 29 cm either side of the body. Mirrors eat into that side gap, and many older UK garages are narrower and shorter than the modern figure, so measure the actual opening and internal walls rather than trusting a standard.

Does the Audi A3 fit in a standard parking bay?

UK parking bays are commonly marked at 2.40 m by 4.80 m. The Audi A3 sits inside it with about 46 cm to spare on length, and leaves about 29 cm either side of the body. Bay sizes vary between car parks and older town-centre sites are often marked smaller.

How much does a Audi A3 weigh?

Kerb weight is 1,340 kg — the car with all fluids and a nominal fuel load, but no driver, passengers or luggage. That is 130 kg heavier than the average hatchback in our data. Kerb weight is not the same as gross vehicle weight, which includes the maximum load the car is plated to carry — that figure is on the VIN plate, usually inside a door shut or under the bonnet.

Are these Audi A3 figures the same for every model year?

No. The figures on this page are for the most common UK specification of the Audi A3 and are representative rather than variant-exact. Generations change size — a nameplate usually grows when it is replaced — and trim, wheel size, roof rails and body style all move the numbers. For the exact car in front of you, check the handbook or the manufacturer's brochure for that model year. Last reviewed August 2026.