Spec Sizes

Porsche 911 vs BMW i8 Dimensions & Size Comparison

Comparing 2015 catalog dimensions. Porsche 911 · BMW i8

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

Side view
  • Length176.8 in – 178.9 in
  • Height50.0 in – 51.1 in
  • Wheelbase96.5 in – 96.7 in
  • Ground clearance4.8 in
  • Curb weight3,153 lb – 3,693 lb
Front / width
  • Width72.9 in – 74.0 in
  • BMW i8 width76.5 in

Which is bigger?

  • Length: Porsche 911 is 7.0 in shorter (177.9 in vs 184.9 in)
  • Width: Porsche 911 is 3.0 in narrower (73.5 in vs 76.5 in)
  • Height: BMW i8 is 0.3 in taller (50.5 in vs 50.8 in)
  • Wheelbase: BMW i8 has a 13.6 in longer wheelbase (96.6 in vs 110.2 in)
  • Ground clearance: Porsche 911 has 0.2 in more ground clearance (4.8 in vs 4.6 in)
  • Curb weight: BMW i8 is 32 lb heavier (3,423 lb vs 3,455 lb)

Biggest size differences

  1. Wheelbase: BMW i8 has a 13.6 in longer wheelbase (96.6 in vs 110.2 in)
  2. Ground clearance: Porsche 911 has 0.2 in more ground clearance (4.8 in vs 4.6 in)
  3. Width: Porsche 911 is 3.0 in narrower (73.5 in vs 76.5 in)
  4. Length: Porsche 911 is 7.0 in shorter (177.9 in vs 184.9 in)
  5. Curb weight: BMW i8 is 32 lb heavier (3,423 lb vs 3,455 lb)

Practical verdicts

  • Easier to fit in a short garagePorsche 911 — Porsche 911 is shorter by 7.0 in Check garage fit for Porsche 911 · garage fit for BMW i8
  • Narrower for tight parkingPorsche 911 — Porsche 911 is narrower by 3.0 in
  • More ground clearancePorsche 911 — Porsche 911 has 0.2 in more clearance
  • Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)

Dimension comparison

SpecPorsche 911BMW i8Difference
Length177.9 in184.9 in7.0 in
Width73.5 in76.5 in3.0 in
Height50.5 in50.8 in0.3 in
Wheelbase96.6 in110.2 in13.6 in
Ground clearance4.8 in4.6 in0.2 in
Curb weight3,423 lb3,455 lb32 lb

Values use trim midpoints when a model year lists a range (e.g. length 176.8 in – 178.9 in).

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.