Spec Sizes

BMW M3 vs Audi S4 Dimensions & Size Comparison

Comparing 2021 catalog dimensions. BMW M3 · Audi S4

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

Side view
  • Length189.1 in
  • Height56.4 in
  • Wheelbase112.5 in
  • Curb weight3,840 lb – 3,890 lb
Front / width
  • Width74.3 in
  • Audi S4 width72.7 in

Which is bigger?

  • Length: Audi S4 is 1.6 in shorter (189.1 in vs 187.5 in)
  • Width: Audi S4 is 1.6 in narrower (74.3 in vs 72.7 in)
  • Height: BMW M3 is 0.2 in taller (56.4 in vs 56.2 in)
  • Wheelbase: BMW M3 has a 1.5 in longer wheelbase (112.5 in vs 111.0 in)
  • Curb weight: BMW M3 is 18 lb heavier (3,865 lb vs 3,847 lb)

Biggest size differences

  1. Width: Audi S4 is 1.6 in narrower (74.3 in vs 72.7 in)
  2. Wheelbase: BMW M3 has a 1.5 in longer wheelbase (112.5 in vs 111.0 in)
  3. Length: Audi S4 is 1.6 in shorter (189.1 in vs 187.5 in)
  4. Curb weight: BMW M3 is 18 lb heavier (3,865 lb vs 3,847 lb)
  5. Height: BMW M3 is 0.2 in taller (56.4 in vs 56.2 in)

Practical verdicts

  • Easier to fit in a short garageAudi S4 — Audi S4 is shorter by 1.6 in Check garage fit for BMW M3 · garage fit for Audi S4
  • Narrower for tight parkingAudi S4 — Audi S4 is narrower by 1.6 in
  • Smaller exterior footprintAudi S4 — Based on length × width (Audi S4)

Dimension comparison

SpecBMW M3Audi S4Difference
Length189.1 in187.5 in1.6 in
Width74.3 in72.7 in1.6 in
Height56.4 in56.2 in0.2 in
Wheelbase112.5 in111.0 in1.5 in
Ground clearance—4.5 in—
Curb weight3,865 lb3,847 lb18 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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