Audi A3 hatchback, Sportback, Saloon and Cabriolet size and dimensions guide

The Audi A3 is a popular choice in the premium compact range, offering buyers a sharply-styled, well-built car with a wide choice of engine and trim levels to cater for most budgets. To help you decide if the A3 is for you, we’ve pulled together all its crucial measurements including exterior size, interior space, boot capacity and turning circle. Bear in mind it comes in four body styles – a three-door hatch, five-door Sportback, Saloon and Cabriolet – each with their own unique measurements. Put any Audi A3 model in our car configurator to see the deals carwow could help you get. For more options, check out our list of the best cars on sale or head over to our car chooser to narrow down your search.

Audi A3 – exterior dimensions

The smallest A3 is the three-door hatchback, at 4,237mm long and 1,777mm wide. The Sportback gains an extra pair of doors to ease access into the rear of the cabin, and measures 73mm longer overall. Even so, the Sportback is shorter than the BMW 1 Series (4,324mm) and only marginally larger than the Mercedes A-Class (4,292mm) The four-door Saloon model is the longest overall, thanks to a boot shape more akin to a three-box saloon than a traditional hatchback. It’s 146mm longer than the Sportback, yet still shorter than its closest rival, the 4,630mm-long Mercedes CLA. The two-door Cabriolet, meanwhile, is slightly shorter than the Saloon.

Audi A3 external dimensions – 3dr/5dr/Saloon/Cabriolet
Length 4,237/4,310/4,456/4,421mm
Width (not including mirrors) 1,777/1,785/1,796/1,793mm
Height 1,421/1,425/1,416/1,409mm
Wheelbase 2,601/2,631/2,637/2,595mm

Audi A3 – interior dimensions

The five-door Sportback is roomier inside than the three-door thanks to the extra length and wheelbase. It has slightly more rear headroom, too – but, unless your head is physically nudging the headlining in the three door, you’d be hard pushed to notice. The Saloon’s sportier roofline compromises headroom slightly, particularly in the rear, where occupants have to manage with 31mm less than Sportback passengers. Nevertheless, it’s still roomier than the Mercedes CLA. It shouldn’t be much of a surprise to discover that the Cabriolet is the least spacious. It’s a strict four seater with no centre seat in the rear bench.

Audi A3 interior dimensions – 3dr/5dr/Saloon/Cabriolet
Headroom (front) 1,020/1,021/1,006/1,000mm
Headroom (rear) 951/955/924/921mm
Shoulder room (front) 1,392mm
Shoulder room (rear) 1,343/1,344/1,345/1,162mm

Audi A3 – boot space

The Cabriolet is the least practical model. At 320 litres – or 285 for quattro four-wheel drive-equipped models – it’s the smallest in the range. Next up is the three-door hatch which, courtesy of a much larger boot opening, makes its 365 litres much more usable. Likewise the marginally larger Sportback which, at 380 litres, offers identical volume to both the Volkswagen Golf and SEAT Leon. The largest overall is the Saloon, which offers a reasonable 425 litres. Much like the cabriolet, however, loading larger items will be trickier than in the two hatchback variants.

Audi A3 boot space – 3dr/5dr/Saloon/Cabriolet
Seats up 365/380/425/320 litres
Seats folded 1,100/1,220/880/678 litres

Audi A3 – turning circle and fuel tank capacity

A tight turning circle can come in handy when parking. At 10.7 metres, the A3 is fairly nimble – beating both the Golf’s 10.9m and the Ford Focus’ 11m circles. The most frugal model in the A3 range is the 1.6 TDI diesel. Should you match the lofty claims of 83.1mpg in the real world, the 50-litre tank filled to the brim should be capable of more than 900 miles between stops. quattro four-wheel drive models – which are generally more thirsty – compensate with a larger 55-litre tank.

Audi A3 turning circle and fuel tank
Turning circle (hardtop models/Cabriolet) 10.7 metres/10.9 metres
Fuel tank (2WD/quattro) 50 litres/55 litres

Audi A3 – weight

The entry-level petrol model, with its compact 1.0-litre three-cylinder engine, is the lightest choice in the range in three-door hatch guise. At the other end of the scale is the S3 Cabriolet. An engine double the size, Audi’s famed four-wheel-drive system and the convertible roof means it weighs 470kg more than the lightest choice.

Audi A3 weights
Lightest Heaviest
1,150kg (1.0 TFSI 3 door) 1,620kg (S3 Cabriolet Auto)

Save money on your Audi A3

Put any Audi A3 model in our car configurator to see the deals carwow could help you get. For more options, check out our list of the best cars on sale or head over to our car chooser to narrow down your search.