Honda Civic Si vs Cadillac ATS Dimensions & Size Comparison

Comparing 2019 catalog dimensions. Honda Civic Si · Cadillac ATS

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

Side view
  • Length177.3 in – 182.8 in
  • Height54.7 in – 55.5 in
  • Wheelbase106.3 in
  • Curb weight2,889 lb – 2,906 lb
Front / width
  • Width70.8 in – 70.9 in
  • Cadillac ATS width72.5 in

Which is bigger?

  • Length: Honda Civic Si is 3.5 in shorter (180.1 in vs 183.6 in)
  • Width: Honda Civic Si is 1.7 in narrower (70.8 in vs 72.5 in)
  • Height: Honda Civic Si is 0.1 in taller (55.1 in vs 55.0 in)
  • Wheelbase: Cadillac ATS has a 3.0 in longer wheelbase (106.3 in vs 109.3 in)
  • Curb weight: Cadillac ATS is 658 lb heavier (2,898 lb vs 3,556 lb)

Biggest size differences

  1. Curb weight: Cadillac ATS is 658 lb heavier (2,898 lb vs 3,556 lb)
  2. Wheelbase: Cadillac ATS has a 3.0 in longer wheelbase (106.3 in vs 109.3 in)
  3. Width: Honda Civic Si is 1.7 in narrower (70.8 in vs 72.5 in)
  4. Length: Honda Civic Si is 3.5 in shorter (180.1 in vs 183.6 in)
  5. Height: Honda Civic Si is 0.1 in taller (55.1 in vs 55.0 in)

Practical verdicts

  • Easier to fit in a short garageHonda Civic SiHonda Civic Si is shorter by 3.5 in Check garage fit for Honda Civic Si · garage fit for Cadillac ATS
  • Narrower for tight parkingHonda Civic SiHonda Civic Si is narrower by 1.7 in
  • Smaller exterior footprintHonda Civic SiBased on length × width (Honda Civic Si)

Dimension comparison

SpecHonda Civic SiCadillac ATSDifference
Length180.1 in183.6 in3.5 in
Width70.8 in72.5 in1.7 in
Height55.1 in55.0 in0.1 in
Wheelbase106.3 in109.3 in3.0 in
Curb weight2,898 lb3,556 lb658 lb

Values use trim midpoints when a model year lists a range (e.g. length 177.3 in – 182.8 in).

Compare by year

Overlapping model years with dimension data.

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