Compare Dimensions Side by Side 2021 Audi A3 Sedan vs. 2026 Audi Q3 III Sportback
Compare the size of two cars side by side and see their differences at a glance. Simply enter the vehicle names, and our tool creates a clear visual comparison of their length, width, and height. This makes it easy to find out which car is longer, wider, or taller, and helps you better understand their overall proportions. Whether you are checking if a car will fit in your garage, comparing everyday models, or exploring larger SUVs, this tool provides a straightforward way to see all key dimensions in one place.
Here’s how the 2021 Audi A3 Sedan and the 2026 Audi Q3 III Sportback compare in size:
In terms of length, the 2026 Audi Q3 III Sportback comes in at 4531 mm (178.39 in), giving it a 36 mm (1.42 in) (0.8 %) advantage over the 2021 Audi A3 Sedan at 4495 mm (176.97 in). Looking at width, the 2026 Audi Q3 III Sportback stretches to 1859 mm (73.19 in), making it 43 mm (1.69 in) (2.3 %) wider than the 2021 Audi A3 Sedan at 1816 mm (71.50 in). As for height, the 2026 Audi Q3 III Sportback reaches 1559 mm (61.38 in), which is 134 mm (5.28 in) (8.6 %) taller than the 2021 Audi A3 Sedan at 1425 mm (56.10 in).
Overall, the 2026 Audi Q3 III Sportback is longer, wider and taller than the 2021 Audi A3 Sedan.
Length
4495 mm177.0 in
4531 mm178.4 in
Width
1816 mm71.5 in
1859 mm73.2 in
Height
1425 mm56.1 in
1559 mm61.4 in
4495 mm177.0 in🔴 -36 mm-1.4 in (-0.8%)
4531 mm178.4 in🟢 +36 mm+1.4 in (+0.8%)
1816 mm71.5 in🔴 -43 mm-1.7 in (-2.3%)
1859 mm73.2 in🟢 +43 mm+1.7 in (+2.4%)
1425 mm56.1 in🔴 -134 mm-5.3 in (-8.6%)
1559 mm61.4 in🟢 +134 mm+5.3 in (+9.4%)
2021 Audi A3 Sedan
2026 Audi Q3 III Sportback
Side-by-Side Specs: Dimensions, Weight & More
General Info
Body Style:
Sedan
Coupe, SUV
Model Year:
2021
2026
Production:
2020-2024 Discontinued Model
n/a
Dimensions
Length:
4495 mm177.0 in 🔴 -36 mm-1.4 in (-0.8%)
4531 mm178.4 in 🟢 +36 mm+1.4 in (+0.8%)
Width:
1816 mm71.5 in 🔴 -43 mm-1.7 in (-2.3%)
1859 mm73.2 in 🟢 +43 mm+1.7 in (+2.4%)
Width (Folded Mirrors):
-
-
Width (Opened Mirrors):
1984 mm78.1 in 🔴 -103 mm-4.1 in (-4.9%)
2087 mm82.2 in 🟢 +103 mm+4.1 in (+5.2%)
Height:
1425 mm56.1 in 🔴 -134 mm-5.3 in (-8.6%)
1559 mm61.4 in 🟢 +134 mm+5.3 in (+9.4%)
Ground Clearance:
-
-
Trunk Capacity:
390-425 liter13.8-15.0 cu ft 🔴 -98 liter-3.5 cu ft (-20.1%) - 🟢 +50 liter+1.8 cu ft (+13.3%)
375-488 liter13.2-17.2 cu ft 🔴 -50 liter-1.8 cu ft (-11.8%) - 🟢 +98 liter+3.5 cu ft (+25.1%)
