Spec Sizes

BMW M4 vs Honda Civic Si Dimensions & Size Comparison

Comparing 2020 catalog dimensions. BMW M4 · Honda Civic Si

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

Side view
  • Length184.5 in
  • Height54.4 in – 54.8 in
  • Wheelbase110.7 in
  • Curb weight3,620 lb – 4,110 lb
Front / width
  • Width73.6 in
  • Honda Civic Si width70.8 in – 70.9 in

Which is bigger?

  • Length: Honda Civic Si is 4.4 in shorter (184.5 in vs 180.1 in)
  • Width: Honda Civic Si is 2.8 in narrower (73.6 in vs 70.8 in)
  • Height: Honda Civic Si is 0.5 in taller (54.6 in vs 55.1 in)
  • Wheelbase: BMW M4 has a 4.4 in longer wheelbase (110.7 in vs 106.3 in)
  • Curb weight: BMW M4 is 968 lb heavier (3,865 lb vs 2,898 lb)

Biggest size differences

  1. Curb weight: BMW M4 is 968 lb heavier (3,865 lb vs 2,898 lb)
  2. Wheelbase: BMW M4 has a 4.4 in longer wheelbase (110.7 in vs 106.3 in)
  3. Width: Honda Civic Si is 2.8 in narrower (73.6 in vs 70.8 in)
  4. Length: Honda Civic Si is 4.4 in shorter (184.5 in vs 180.1 in)
  5. Height: Honda Civic Si is 0.5 in taller (54.6 in vs 55.1 in)

Practical verdicts

  • Easier to fit in a short garageHonda Civic Si — Honda Civic Si is shorter by 4.4 in Check garage fit for BMW M4 · garage fit for Honda Civic Si
  • Narrower for tight parkingHonda Civic Si — Honda Civic Si is narrower by 2.8 in
  • Smaller exterior footprintHonda Civic Si — Based on length × width (Honda Civic Si)

Dimension comparison

SpecBMW M4Honda Civic SiDifference
Length184.5 in180.1 in4.4 in
Width73.6 in70.8 in2.8 in
Height54.6 in55.1 in0.5 in
Wheelbase110.7 in106.3 in4.4 in
Curb weight3,865 lb2,898 lb968 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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