Spec Sizes

Porsche 911 vs BMW M4 Dimensions & Size Comparison

Comparing 2020 catalog dimensions. Porsche 911 · BMW M4

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

Side view
  • Length177.9 in
  • Height51.2 in
  • Wheelbase96.5 in
  • Ground clearance4.0 in
  • Curb weight3,382 lb – 3,641 lb
Front / width
  • Width72.9 in
  • BMW M4 width73.6 in

Which is bigger?

  • Length: Porsche 911 is 6.6 in shorter (177.9 in vs 184.5 in)
  • Width: Porsche 911 is 0.7 in narrower (72.9 in vs 73.6 in)
  • Height: BMW M4 is 3.4 in taller (51.2 in vs 54.6 in)
  • Wheelbase: BMW M4 has a 14.2 in longer wheelbase (96.5 in vs 110.7 in)
  • Curb weight: BMW M4 is 354 lb heavier (3,512 lb vs 3,865 lb)

Biggest size differences

  1. Wheelbase: BMW M4 has a 14.2 in longer wheelbase (96.5 in vs 110.7 in)
  2. Curb weight: BMW M4 is 354 lb heavier (3,512 lb vs 3,865 lb)
  3. Height: BMW M4 is 3.4 in taller (51.2 in vs 54.6 in)
  4. Length: Porsche 911 is 6.6 in shorter (177.9 in vs 184.5 in)
  5. Width: Porsche 911 is 0.7 in narrower (72.9 in vs 73.6 in)

Practical verdicts

  • Easier to fit in a short garagePorsche 911 — Porsche 911 is shorter by 6.6 in Check garage fit for Porsche 911 · garage fit for BMW M4
  • Narrower for tight parkingPorsche 911 — Porsche 911 is narrower by 0.7 in
  • Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)

Dimension comparison

SpecPorsche 911BMW M4Difference
Length177.9 in184.5 in6.6 in
Width72.9 in73.6 in0.7 in
Height51.2 in54.6 in3.4 in
Wheelbase96.5 in110.7 in14.2 in
Ground clearance4.0 in——
Curb weight3,512 lb3,865 lb354 lb

Values use trim midpoints when a model year lists a range.

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Overlapping model years with dimension data.

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