Spec Sizes

BMW M3 vs Audi A4 Dimensions & Size Comparison

Comparing 2008 catalog dimensions. BMW M3 · Audi A4

Same scale for both vehicles. Generic silhouette — proportional to measured length, height, width, wheelbase, and clearance.

Side view
  • Length180.4 in – 181.8 in
  • Height54.8 in – 55.7 in
  • Wheelbase108.7 in
  • Curb weight3,704 lb – 4,145 lb
Front / width
  • Width70.2 in – 71.5 in
  • Audi A4 width69.8 in – 70.0 in

Which is bigger?

  • Length: Audi A4 is 0.3 in shorter (181.1 in vs 180.8 in)
  • Width: Audi A4 is 0.9 in narrower (70.8 in vs 69.9 in)
  • Height: Audi A4 is 1.0 in taller (55.3 in vs 56.2 in)
  • Wheelbase: BMW M3 has a 4.4 in longer wheelbase (108.7 in vs 104.3 in)
  • Curb weight: BMW M3 is 171 lb heavier (3,925 lb vs 3,754 lb)

Biggest size differences

  1. Curb weight: BMW M3 is 171 lb heavier (3,925 lb vs 3,754 lb)
  2. Wheelbase: BMW M3 has a 4.4 in longer wheelbase (108.7 in vs 104.3 in)
  3. Height: Audi A4 is 1.0 in taller (55.3 in vs 56.2 in)
  4. Width: Audi A4 is 0.9 in narrower (70.8 in vs 69.9 in)
  5. Length: Audi A4 is 0.3 in shorter (181.1 in vs 180.8 in)

Practical verdicts

  • Easier to fit in a short garageAudi A4 — Audi A4 is shorter by 0.3 in Check garage fit for BMW M3 · garage fit for Audi A4
  • Narrower for tight parkingAudi A4 — Audi A4 is narrower by 0.9 in
  • Smaller exterior footprintAudi A4 — Based on length × width (Audi A4)

Dimension comparison

SpecBMW M3Audi A4Difference
Length181.1 in180.8 in0.3 in
Width70.8 in69.9 in0.9 in
Height55.3 in56.2 in1.0 in
Wheelbase108.7 in104.3 in4.4 in
Curb weight3,925 lb3,754 lb171 lb

Values use trim midpoints when a model year lists a range (e.g. length 180.4 in – 181.8 in).

Compare by year

Overlapping model years with dimension data.

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