Spec Sizes

BMW M4 vs Porsche 911 Dimensions & Size Comparison

Comparing 2018 catalog dimensions. BMW M4 · Porsche 911

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

Side view
  • Length184.5 in
  • Height54.4 in – 54.6 in
  • Wheelbase110.7 in
  • Ground clearance4.7 in
  • Curb weight3,530 lb – 4,055 lb
Front / width
  • Width73.6 in
  • Porsche 911 width71.2 in – 74.0 in

Which is bigger?

  • Length: Porsche 911 is 6.2 in shorter (184.5 in vs 178.3 in)
  • Width: Porsche 911 is 1.0 in narrower (73.6 in vs 72.6 in)
  • Height: BMW M4 is 4.0 in taller (54.5 in vs 50.5 in)
  • Wheelbase: BMW M4 has a 14.1 in longer wheelbase (110.7 in vs 96.6 in)
  • Ground clearance: BMW M4 has 0.7 in more ground clearance (4.7 in vs 4.0 in)
  • Curb weight: BMW M4 is 375 lb heavier (3,793 lb vs 3,418 lb)

Biggest size differences

  1. Ground clearance: BMW M4 has 0.7 in more ground clearance (4.7 in vs 4.0 in)
  2. Wheelbase: BMW M4 has a 14.1 in longer wheelbase (110.7 in vs 96.6 in)
  3. Curb weight: BMW M4 is 375 lb heavier (3,793 lb vs 3,418 lb)
  4. Height: BMW M4 is 4.0 in taller (54.5 in vs 50.5 in)
  5. Length: Porsche 911 is 6.2 in shorter (184.5 in vs 178.3 in)

Practical verdicts

  • Easier to fit in a short garagePorsche 911 — Porsche 911 is shorter by 6.2 in Check garage fit for BMW M4 · garage fit for Porsche 911
  • Narrower for tight parkingPorsche 911 — Porsche 911 is narrower by 1.0 in
  • More ground clearanceBMW M4 — BMW M4 has 0.7 in more clearance
  • Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)

Dimension comparison

SpecBMW M4Porsche 911Difference
Length184.5 in178.3 in6.2 in
Width73.6 in72.6 in1.0 in
Height54.5 in50.5 in4.0 in
Wheelbase110.7 in96.6 in14.1 in
Ground clearance4.7 in4.0 in0.7 in
Curb weight3,793 lb3,418 lb375 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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