Spec Sizes

BMW M4 vs Porsche 911 Dimensions & Size Comparison

Comparing 2019 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 – 184.6 in
  • Height54.4 in – 54.8 in
  • Wheelbase110.7 in
  • Curb weight3,620 lb – 4,070 lb
Front / width
  • Width73.6 in – 79.3 in
  • Porsche 911 width71.2 in – 74.0 in

Which is bigger?

  • Length: Porsche 911 is 6.2 in shorter (184.6 in vs 178.3 in)
  • Width: Porsche 911 is 3.8 in narrower (76.4 in vs 72.6 in)
  • Height: BMW M4 is 4.4 in taller (54.6 in vs 50.2 in)
  • Wheelbase: BMW M4 has a 14.1 in longer wheelbase (110.7 in vs 96.6 in)
  • Curb weight: BMW M4 is 433 lb heavier (3,845 lb vs 3,412 lb)

Biggest size differences

  1. Wheelbase: BMW M4 has a 14.1 in longer wheelbase (110.7 in vs 96.6 in)
  2. Curb weight: BMW M4 is 433 lb heavier (3,845 lb vs 3,412 lb)
  3. Height: BMW M4 is 4.4 in taller (54.6 in vs 50.2 in)
  4. Width: Porsche 911 is 3.8 in narrower (76.4 in vs 72.6 in)
  5. Length: Porsche 911 is 6.2 in shorter (184.6 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 3.8 in
  • Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)

Dimension comparison

SpecBMW M4Porsche 911Difference
Length184.6 in178.3 in6.2 in
Width76.4 in72.6 in3.8 in
Height54.6 in50.2 in4.4 in
Wheelbase110.7 in96.6 in14.1 in
Ground clearance—4.0 in—
Curb weight3,845 lb3,412 lb433 lb

Values use trim midpoints when a model year lists a range (e.g. length 184.5 in – 184.6 in).

Compare by year

Overlapping model years with dimension data.

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