Size comparison · drawn to scale
Mercedes-Benz A-Class W177 vs Audi A3 8Y: size comparison
- Length A-Class W177 76 mm3 in longer
- Width A3 8Y 20 mm0.8 in wider
- Height About the same height
- Boot A3 8Y 25 L0.9 cu ft more
Car 1 blue, solid outline

Car 2 coral, dashed outline
Change cars
Zoom in to read the measurements - or see the table below.
Scale about 1:20 on a desktop screen · grid 500 mm1 ft · in Overlay both cars start at the front bumper Side view: dashed lines mark the axles Front view: width without mirrors Top view: footprint on the road
Dimensions and difference
The A-Class W177 is 76 mm3 in longer, 20 mm0.8 in narrower and 9 mm0.4 in lower than the A3 8Y. Its wheelbase is 93 mm4 in longer.
| Dimension | A-Class W177 | A3 8Y | Difference, car 1 vs car 2 |
|---|---|---|---|
| Length | 4,419 mm14 ft 6 in14 ft 6 in4,419 mm | 4,343 mm14 ft 3 in14 ft 3 in4,343 mm | +76 mm+3 in +1.7% |
| Width | 1,796 mm5 ft 11 in5 ft 11 in1,796 mm | 1,816 mm5 ft 11 in5 ft 11 in1,816 mm | −20 mm−0.8 in −1.1% |
| Height | 1,440 mm4 ft 9 in4 ft 9 in1,440 mm | 1,449 mm4 ft 9 in4 ft 9 in1,449 mm | −9 mm−0.4 in −0.6% |
| Wheelbase | 2,729 mm8 ft 11 in8 ft 11 in2,729 mm | 2,636 mm8 ft 8 in8 ft 8 in2,636 mm | +93 mm+4 in +3.5% |
| Footprint | 7.94 m²85.4 sq ft85.4 sq ft7.94 m² | 7.89 m²84.9 sq ft84.9 sq ft7.89 m² | +0.05 m²+0.5 sq ft +0.6% |
| Boot | 355 L12.5 cu ft12.5 cu ft355 L | 380 L13.4 cu ft13.4 cu ft380 L | −25 L−0.9 cu ft −6.6% |
| Kerb weight | 1,350–1,680 kg2,976–3,704 lb2,976–3,704 lb1,350–1,680 kg | 1,355–1,470 kg2,987–3,241 lb2,987–3,241 lb1,355–1,470 kg | −5 kg−11 lb −0.4% |
Width without mirrors. Figures come from the catalog version pages; the drawing uses the same numbers. Body outlines are generic for the body type - proportions are exact, styling is not. Weight difference compares the lightest versions.
Garage and parking
A typical single garage is about 5.5 × 3.0 m18 ft 1 in × 9 ft 10 in inside; a parking bay about 5.0 × 2.5 m16 ft 5 in × 8 ft 2 in. Room to open a door: about 600 mm2 ft each side.
A-Class W177
- Single garage
- Fits 1,081 mm3 ft 7 in to spare in length, 602 mm2 ft 0 in each side
- Parking bay
- Tight 581 mm1 ft 11 in to spare in length, 352 mm1 ft 2 in each side
A3 8Y
- Single garage
- Tight 1,157 mm3 ft 10 in to spare in length, 592 mm1 ft 11 in each side
- Parking bay
- Tight 657 mm2 ft 2 in to spare in length, 342 mm1 ft 1 in each side
Frequently asked questions
Which is bigger, the Mercedes-Benz A-Class W177 or the Audi A3 8Y?
The Mercedes-Benz A-Class W177 is the bigger car by footprint (length × width). The A-Class W177 is 76 mm longer, 20 mm narrower and 9 mm lower than the A3 8Y. Its wheelbase is 93 mm longer.
Will the Mercedes-Benz A-Class W177 and the Audi A3 8Y fit in a standard garage?
In a typical single garage of 5.5 × 3.0 m inside: The Mercedes-Benz A-Class W177 fits with room to open the doors (1,081 mm to spare in length, 602 mm each side). The Audi A3 8Y fits, but it is tight to get out (1,157 mm to spare in length, 592 mm each side). Widths are without mirrors; check your own garage with our garage checker.
Which has the bigger boot?
The Audi A3 8Y: 380 L against 355 L in the Mercedes-Benz A-Class W177 (seats up, as quoted by the maker).
Drawn to one scale
Both cars use the same millimetre grid, so a longer bonnet or a taller roof shows exactly as it is.
Wheels at the real wheelbase
Dashed lines mark the axles. In Overlay both cars start at the front bumper; car 2 has a dashed outline.
Will it fit my garage?
Switch to Top view, or to feet and inches if your garage plan is in feet. Allow about 600 mm (2 ft) for opening the doors.
