Spec Sizes

BMW M3 vs Audi S4 Dimensions & Size Comparison

Comparing 2009 catalog dimensions. BMW M3 · Audi S4

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 – 57.0 in
  • Wheelbase108.7 in
  • Curb weight3,704 lb – 4,145 lb
Front / width
  • Width71.0 in – 71.5 in
  • Audi S4 width70.0 in

Which is bigger?

  • Length: Audi S4 is 1.1 in shorter (181.1 in vs 180.0 in)
  • Width: Audi S4 is 1.3 in narrower (71.3 in vs 70.0 in)
  • Height: BMW M3 is 1.1 in taller (55.9 in vs 54.8 in)
  • Wheelbase: BMW M3 has a 4.2 in longer wheelbase (108.7 in vs 104.5 in)
  • Curb weight: Audi S4 is 287 lb heavier (3,925 lb vs 4,211 lb)

Biggest size differences

  1. Curb weight: Audi S4 is 287 lb heavier (3,925 lb vs 4,211 lb)
  2. Wheelbase: BMW M3 has a 4.2 in longer wheelbase (108.7 in vs 104.5 in)
  3. Height: BMW M3 is 1.1 in taller (55.9 in vs 54.8 in)
  4. Width: Audi S4 is 1.3 in narrower (71.3 in vs 70.0 in)
  5. Length: Audi S4 is 1.1 in shorter (181.1 in vs 180.0 in)

Practical verdicts

  • Easier to fit in a short garageAudi S4 — Audi S4 is shorter by 1.1 in Check garage fit for BMW M3 · garage fit for Audi S4
  • Narrower for tight parkingAudi S4 — Audi S4 is narrower by 1.3 in
  • Smaller exterior footprintAudi S4 — Based on length × width (Audi S4)

Dimension comparison

SpecBMW M3Audi S4Difference
Length181.1 in180.0 in1.1 in
Width71.3 in70.0 in1.3 in
Height55.9 in54.8 in1.1 in
Wheelbase108.7 in104.5 in4.2 in
Curb weight3,925 lb4,211 lb287 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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