Spec Sizes

BMW M3 vs Cadillac ATS Dimensions & Size Comparison

Comparing 2017 vs 2019 catalog dimensions. BMW M3 · Cadillac ATS

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

Side view
  • Length184.5 in
  • Height56.1 in
  • Wheelbase110.7 in
  • Ground clearance4.7 in
  • Curb weight3,540 lb
Front / width
  • Width73.9 in
  • Cadillac ATS width72.5 in

Which is bigger?

  • Length: Cadillac ATS is 0.9 in shorter (184.5 in vs 183.6 in)
  • Width: Cadillac ATS is 1.4 in narrower (73.9 in vs 72.5 in)
  • Height: BMW M3 is 1.1 in taller (56.1 in vs 55.0 in)
  • Wheelbase: BMW M3 has a 1.4 in longer wheelbase (110.7 in vs 109.3 in)
  • Curb weight: Cadillac ATS is 16 lb heavier (3,540 lb vs 3,556 lb)

Biggest size differences

  1. Width: Cadillac ATS is 1.4 in narrower (73.9 in vs 72.5 in)
  2. Height: BMW M3 is 1.1 in taller (56.1 in vs 55.0 in)
  3. Wheelbase: BMW M3 has a 1.4 in longer wheelbase (110.7 in vs 109.3 in)
  4. Length: Cadillac ATS is 0.9 in shorter (184.5 in vs 183.6 in)
  5. Curb weight: Cadillac ATS is 16 lb heavier (3,540 lb vs 3,556 lb)

Practical verdicts

  • Easier to fit in a short garageCadillac ATS — Cadillac ATS is shorter by 0.9 in Check garage fit for BMW M3 · garage fit for Cadillac ATS
  • Narrower for tight parkingCadillac ATS — Cadillac ATS is narrower by 1.4 in
  • Smaller exterior footprintCadillac ATS — Based on length × width (Cadillac ATS)

Dimension comparison

SpecBMW M3Cadillac ATSDifference
Length184.5 in183.6 in0.9 in
Width73.9 in72.5 in1.4 in
Height56.1 in55.0 in1.1 in
Wheelbase110.7 in109.3 in1.4 in
Ground clearance4.7 in——
Curb weight3,540 lb3,556 lb16 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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