Spec Sizes

BMW i8 vs Porsche 911 Dimensions & Size Comparison

Comparing 2020 catalog dimensions. BMW i8 · Porsche 911

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

Side view
  • Length184.9 in
  • Height50.7 in – 50.8 in
  • Wheelbase110.2 in
  • Curb weight3,501 lb – 3,671 lb
Front / width
  • Width76.5 in
  • Porsche 911 width72.9 in

Which is bigger?

  • Length: Porsche 911 is 7.0 in shorter (184.9 in vs 177.9 in)
  • Width: Porsche 911 is 3.6 in narrower (76.5 in vs 72.9 in)
  • Height: Porsche 911 is 0.5 in taller (50.8 in vs 51.2 in)
  • Wheelbase: BMW i8 has a 13.7 in longer wheelbase (110.2 in vs 96.5 in)
  • Curb weight: BMW i8 is 75 lb heavier (3,586 lb vs 3,512 lb)

Biggest size differences

  1. Wheelbase: BMW i8 has a 13.7 in longer wheelbase (110.2 in vs 96.5 in)
  2. Width: Porsche 911 is 3.6 in narrower (76.5 in vs 72.9 in)
  3. Length: Porsche 911 is 7.0 in shorter (184.9 in vs 177.9 in)
  4. Curb weight: BMW i8 is 75 lb heavier (3,586 lb vs 3,512 lb)
  5. Height: Porsche 911 is 0.5 in taller (50.8 in vs 51.2 in)

Practical verdicts

  • Easier to fit in a short garagePorsche 911 — Porsche 911 is shorter by 7.0 in Check garage fit for BMW i8 · garage fit for Porsche 911
  • Narrower for tight parkingPorsche 911 — Porsche 911 is narrower by 3.6 in
  • Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)

Dimension comparison

SpecBMW i8Porsche 911Difference
Length184.9 in177.9 in7.0 in
Width76.5 in72.9 in3.6 in
Height50.8 in51.2 in0.5 in
Wheelbase110.2 in96.5 in13.7 in
Ground clearance—4.0 in—
Curb weight3,586 lb3,512 lb75 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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