Honda Civic Si vs Cadillac CT4 Dimensions & Size Comparison

Comparing 2020 catalog dimensions. Honda Civic Si · Cadillac CT4

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 CT4 width71.4 in

Which is bigger?

  • Length: Honda Civic Si is 7.1 in shorter (180.1 in vs 187.2 in)
  • Width: Honda Civic Si is 0.6 in narrower (70.8 in vs 71.4 in)
  • Height: Cadillac CT4 is 0.9 in taller (55.1 in vs 56.0 in)
  • Wheelbase: Cadillac CT4 has a 3.0 in longer wheelbase (106.3 in vs 109.3 in)
  • Curb weight: Cadillac CT4 is 694 lb heavier (2,898 lb vs 3,592 lb)

Biggest size differences

  1. Curb weight: Cadillac CT4 is 694 lb heavier (2,898 lb vs 3,592 lb)
  2. Length: Honda Civic Si is 7.1 in shorter (180.1 in vs 187.2 in)
  3. Wheelbase: Cadillac CT4 has a 3.0 in longer wheelbase (106.3 in vs 109.3 in)
  4. Height: Cadillac CT4 is 0.9 in taller (55.1 in vs 56.0 in)
  5. Width: Honda Civic Si is 0.6 in narrower (70.8 in vs 71.4 in)

Practical verdicts

  • Easier to fit in a short garageHonda Civic SiHonda Civic Si is shorter by 7.1 in Check garage fit for Honda Civic Si · garage fit for Cadillac CT4
  • Narrower for tight parkingHonda Civic SiHonda Civic Si is narrower by 0.6 in
  • Smaller exterior footprintHonda Civic SiBased on length × width (Honda Civic Si)

Dimension comparison

SpecHonda Civic SiCadillac CT4Difference
Length180.1 in187.2 in7.1 in
Width70.8 in71.4 in0.6 in
Height55.1 in56.0 in0.9 in
Wheelbase106.3 in109.3 in3.0 in
Curb weight2,898 lb3,592 lb694 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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