Compare Dimensions Side by Side 2026 Audi Q3 III vs. 2021 Audi A3 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 2026 Audi Q3 III and the 2021 Audi A3 Sportback compare in size:
In terms of length, the 2026 Audi Q3 III measures 4531 mm (178.39 in), making it 188 mm (7.40 in) (4.1 %) longer than the 2021 Audi A3 Sportback at 4343 mm (170.98 in). Looking at width, the 2026 Audi Q3 III spans 1859 mm (73.19 in), which is 43 mm (1.69 in) (2.3 %) broader than the 2021 Audi A3 Sportback at 1816 mm (71.50 in). As for height, the 2026 Audi Q3 III stands at 1601 mm (63.03 in), giving it an extra 143 mm (5.63 in) (8.9 %) compared to the 2021 Audi A3 Sportback at 1458 mm (57.40 in).
Overall, the 2026 Audi Q3 III is longer, wider and taller than the 2021 Audi A3 Sportback.
Length
4531 mm178.4 in
4343 mm171.0 in
Width
1859 mm73.2 in
1816 mm71.5 in
Height
1601 mm63.0 in
1458 mm57.4 in
4531 mm178.4 in🟢 +188 mm+7.4 in (+4.3%)
4343 mm171.0 in🔴 -188 mm-7.4 in (-4.1%)
1859 mm73.2 in🟢 +43 mm+1.7 in (+2.4%)
1816 mm71.5 in🔴 -43 mm-1.7 in (-2.3%)
1601 mm63.0 in🟢 +143 mm+5.6 in (+9.8%)
1458 mm57.4 in🔴 -143 mm-5.6 in (-8.9%)
2026 Audi Q3 III
2021 Audi A3 Sportback
Side-by-Side Specs: Dimensions, Weight & More
General Info
Body Style:
SUV
Hatchback
Model Year:
2026
2021
Production:
2025-present Current Model
2020-2024 Discontinued Model
Dimensions
Length:
4531 mm178.4 in 🟢 +188 mm+7.4 in (+4.3%)
4343 mm171.0 in 🔴 -188 mm-7.4 in (-4.1%)
Width:
1859 mm73.2 in 🟢 +43 mm+1.7 in (+2.4%)
1816 mm71.5 in 🔴 -43 mm-1.7 in (-2.3%)
Width (Folded Mirrors):
-
-
Width (Opened Mirrors):
2087 mm82.2 in 🟢 +103 mm+4.1 in (+5.2%)
1984 mm78.1 in 🔴 -103 mm-4.1 in (-4.9%)
Height:
1601 mm63.0 in 🟢 +143 mm+5.6 in (+9.8%) - 🟢 +152 mm+6.0 in (+10.5%)
1449-1458 mm57.0-57.4 in 🔴 -152 mm-6.0 in (-9.5%) - 🔴 -143 mm-5.6 in (-8.9%)
Ground Clearance:
-
-
Trunk Capacity:
375-488 liter13.2-17.2 cu ft 🔴 -5 liter-0.2 cu ft (-1.3%) - 🟢 +208 liter+7.3 cu ft (+74.3%)
280-380 liter9.9-13.4 cu ft 🔴 -208 liter-7.3 cu ft (-42.6%) - 🟢 +5 liter+0.2 cu ft (+1.3%)
Trunk Capacity (Max):
1293-1386 liter45.7-48.9 cu ft 🟢 +93 liter+3.3 cu ft (+7.8%) - 🟢 +286 liter+10.1 cu ft (+26.0%)
1100-1200 liter38.8-42.4 cu ft 🔴 -286 liter-10.1 cu ft (-20.6%) - 🔴 -93 liter-3.3 cu ft (-7.2%)
