Spec Sizes

BMW M3 vs Audi S4 Dimensions & Size Comparison

Comparing 2013 catalog dimensions. BMW M3 · Audi S4

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

Side view
  • Length181.8 in
  • Height54.8 in – 55.8 in
  • Wheelbase108.7 in
  • Curb weight3,704 lb – 4,145 lb
Front / width
  • Width71.0 in
  • Audi S4 width71.9 in

Which is bigger?

  • Length: BMW M3 is 3.9 in shorter (181.8 in vs 185.7 in)
  • Width: BMW M3 is 0.9 in narrower (71.0 in vs 71.9 in)
  • Height: Audi S4 is 0.1 in taller (55.3 in vs 55.4 in)
  • Wheelbase: Audi S4 has a 2.0 in longer wheelbase (108.7 in vs 110.7 in)
  • Curb weight: BMW M3 is 67 lb heavier (3,925 lb vs 3,858 lb)

Biggest size differences

  1. Length: BMW M3 is 3.9 in shorter (181.8 in vs 185.7 in)
  2. Wheelbase: Audi S4 has a 2.0 in longer wheelbase (108.7 in vs 110.7 in)
  3. Curb weight: BMW M3 is 67 lb heavier (3,925 lb vs 3,858 lb)
  4. Width: BMW M3 is 0.9 in narrower (71.0 in vs 71.9 in)
  5. Height: Audi S4 is 0.1 in taller (55.3 in vs 55.4 in)

Practical verdicts

  • Easier to fit in a short garageBMW M3 — BMW M3 is shorter by 3.9 in Check garage fit for BMW M3 · garage fit for Audi S4
  • Narrower for tight parkingBMW M3 — BMW M3 is narrower by 0.9 in
  • Smaller exterior footprintBMW M3 — Based on length × width (BMW M3)

Dimension comparison

SpecBMW M3Audi S4Difference
Length181.8 in185.7 in3.9 in
Width71.0 in71.9 in0.9 in
Height55.3 in55.4 in0.1 in
Wheelbase108.7 in110.7 in2.0 in
Curb weight3,925 lb3,858 lb67 lb

Values use trim midpoints when a model year lists a range.

Compare by year

Overlapping model years with dimension data.

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