2018 Mercedes-Benz A-class Sedan vs 2026 Audi Q3 III
Compare Dimensions Side by Side 2018 Mercedes-Benz A-class Sedan vs. 2026 Audi Q3 III
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 2018 Mercedes-Benz A-class Sedan and the 2026 Audi Q3 III compare in size:
In terms of length, the 2018 Mercedes-Benz A-class Sedan measures 4549 mm (179.09 in), making it 18 mm (0.71 in) (0.4 %) longer than the 2026 Audi Q3 III at 4531 mm (178.39 in). Looking at width, the 2026 Audi Q3 III stretches to 1859 mm (73.19 in), making it 63 mm (2.48 in) (3.4 %) wider than the 2018 Mercedes-Benz A-class Sedan at 1796 mm (70.71 in). As for height, the 2026 Audi Q3 III reaches 1601 mm (63.03 in), which is 143 mm (5.63 in) (8.9 %) taller than the 2018 Mercedes-Benz A-class Sedan at 1458 mm (57.40 in).
Overall, the 2018 Mercedes-Benz A-class Sedan is longer than the 2026 Audi Q3 III, while the 2026 Audi Q3 III is wider and taller than the 2018 Mercedes-Benz A-class Sedan.
Length
4549 mm179.1 in
4531 mm178.4 in
Width
1796 mm70.7 in
1859 mm73.2 in
Height
1458 mm57.4 in
1601 mm63.0 in
4549 mm179.1 in🟢 +18 mm+0.7 in (+0.4%)
4531 mm178.4 in🔴 -18 mm-0.7 in (-0.4%)
1796 mm70.7 in🔴 -63 mm-2.5 in (-3.4%)
1859 mm73.2 in🟢 +63 mm+2.5 in (+3.5%)
1458 mm57.4 in🔴 -143 mm-5.6 in (-8.9%)
1601 mm63.0 in🟢 +143 mm+5.6 in (+9.8%)
2018 Mercedes-Benz A-class Sedan
2026 Audi Q3 III
Side-by-Side Specs: Dimensions, Weight & More
General Info
Body Style:
Sedan
SUV
Model Year:
2018
2026
Production:
2018-2022 Discontinued Model
2025-present Current Model
Dimensions
Length:
4549 mm179.1 in 🟢 +18 mm+0.7 in (+0.4%)
4531 mm178.4 in 🔴 -18 mm-0.7 in (-0.4%)
Width:
1796 mm70.7 in 🔴 -63 mm-2.5 in (-3.4%)
1859 mm73.2 in 🟢 +63 mm+2.5 in (+3.5%)
Width (Folded Mirrors):
-
-
Width (Opened Mirrors):
1992 mm78.4 in 🔴 -95 mm-3.7 in (-4.6%)
2087 mm82.2 in 🟢 +95 mm+3.7 in (+4.8%)
Height:
1446-1458 mm56.9-57.4 in 🔴 -155 mm-6.1 in (-9.7%) - 🔴 -143 mm-5.6 in (-8.9%)
1601 mm63.0 in 🟢 +143 mm+5.6 in (+9.8%) - 🟢 +155 mm+6.1 in (+10.7%)
Ground Clearance:
104 mm4.1 in
-
Trunk Capacity:
345-420 liter12.2-14.8 cu ft 🔴 -143 liter-5.0 cu ft (-29.3%) - 🟢 +45 liter+1.6 cu ft (+12.0%)
375-488 liter13.2-17.2 cu ft 🔴 -45 liter-1.6 cu ft (-10.7%) - 🟢 +143 liter+5.0 cu ft (+41.4%)
