Spec Sizes

Cadillac ATS vs Honda Civic Si Dimensions & Size Comparison

Comparing 2019 vs 2022 catalog dimensions. Cadillac ATS · Honda Civic Si

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

Side view
  • Length183.6 in
  • Height54.8 in – 55.3 in
  • Wheelbase109.3 in
  • Curb weight3,418 lb – 3,693 lb
Front / width
  • Width72.5 in
  • Honda Civic Si width70.9 in

Which is bigger?

  • Length: Cadillac ATS is 0.4 in shorter (183.6 in vs 184.0 in)
  • Width: Honda Civic Si is 1.6 in narrower (72.5 in vs 70.9 in)
  • Height: Honda Civic Si is 0.5 in taller (55.0 in vs 55.5 in)
  • Wheelbase: Cadillac ATS has a 1.6 in longer wheelbase (109.3 in vs 107.7 in)
  • Curb weight: Cadillac ATS is 599 lb heavier (3,556 lb vs 2,957 lb)

Biggest size differences

  1. Curb weight: Cadillac ATS is 599 lb heavier (3,556 lb vs 2,957 lb)
  2. Width: Honda Civic Si is 1.6 in narrower (72.5 in vs 70.9 in)
  3. Wheelbase: Cadillac ATS has a 1.6 in longer wheelbase (109.3 in vs 107.7 in)
  4. Height: Honda Civic Si is 0.5 in taller (55.0 in vs 55.5 in)
  5. Length: Cadillac ATS is 0.4 in shorter (183.6 in vs 184.0 in)

Practical verdicts

  • Easier to fit in a short garageCadillac ATS — Cadillac ATS is shorter by 0.4 in Check garage fit for Cadillac ATS · garage fit for Honda Civic Si
  • Narrower for tight parkingHonda Civic Si — Honda Civic Si is narrower by 1.6 in
  • Smaller exterior footprintHonda Civic Si — Based on length × width (Honda Civic Si)

Dimension comparison

SpecCadillac ATSHonda Civic SiDifference
Length183.6 in184.0 in0.4 in
Width72.5 in70.9 in1.6 in
Height55.0 in55.5 in0.5 in
Wheelbase109.3 in107.7 in1.6 in
Curb weight3,556 lb2,957 lb599 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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