Spec Sizes

BMW M4 vs Porsche 911 Dimensions & Size Comparison

Comparing 2015 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
  • Wheelbase110.7 in
  • Ground clearance4.8 in
  • Curb weight3,530 lb
Front / width
  • Width73.6 in
  • Porsche 911 width72.9 in – 74.0 in

Which is bigger?

  • Length: Porsche 911 is 6.6 in shorter (184.5 in vs 177.9 in)
  • Width: Porsche 911 is 0.1 in narrower (73.6 in vs 73.5 in)
  • Height: BMW M4 is 3.9 in taller (54.4 in vs 50.5 in)
  • Wheelbase: BMW M4 has a 14.1 in longer wheelbase (110.7 in vs 96.6 in)
  • Ground clearance: essentially the same
  • Curb weight: BMW M4 is 107 lb heavier (3,530 lb vs 3,423 lb)

Biggest size differences

  1. Wheelbase: BMW M4 has a 14.1 in longer wheelbase (110.7 in vs 96.6 in)
  2. Height: BMW M4 is 3.9 in taller (54.4 in vs 50.5 in)
  3. Length: Porsche 911 is 6.6 in shorter (184.5 in vs 177.9 in)
  4. Curb weight: BMW M4 is 107 lb heavier (3,530 lb vs 3,423 lb)
  5. Width: Porsche 911 is 0.1 in narrower (73.6 in vs 73.5 in)

Practical verdicts

  • Easier to fit in a short garagePorsche 911 — Porsche 911 is shorter by 6.6 in Check garage fit for BMW M4 · garage fit for Porsche 911
  • Narrower for tight parkingPorsche 911 — Porsche 911 is narrower by 0.1 in
  • Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)

Dimension comparison

SpecBMW M4Porsche 911Difference
Length184.5 in177.9 in6.6 in
Width73.6 in73.5 in0.1 in
Height54.4 in50.5 in3.9 in
Wheelbase110.7 in96.6 in14.1 in
Ground clearance4.8 in4.8 in0.0 in
Curb weight3,530 lb3,423 lb107 lb

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

Compare by year

Overlapping model years with dimension data.

Already own one of these cars?

Jump to maintenance sizes on the vehicle page — tires, wipers, battery, and oil when present in the catalog.