Spec Sizes

BMW i8 vs BMW M4 Dimensions & Size Comparison

Comparing 2020 catalog dimensions. BMW i8 · BMW M4

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
  • BMW M4 width73.6 in

Which is bigger?

  • Length: BMW M4 is 0.4 in shorter (184.9 in vs 184.5 in)
  • Width: BMW M4 is 2.9 in narrower (76.5 in vs 73.6 in)
  • Height: BMW M4 is 3.8 in taller (50.8 in vs 54.6 in)
  • Wheelbase: BMW M4 has a 0.5 in longer wheelbase (110.2 in vs 110.7 in)
  • Curb weight: BMW M4 is 279 lb heavier (3,586 lb vs 3,865 lb)

Biggest size differences

  1. Curb weight: BMW M4 is 279 lb heavier (3,586 lb vs 3,865 lb)
  2. Height: BMW M4 is 3.8 in taller (50.8 in vs 54.6 in)
  3. Width: BMW M4 is 2.9 in narrower (76.5 in vs 73.6 in)
  4. Wheelbase: BMW M4 has a 0.5 in longer wheelbase (110.2 in vs 110.7 in)
  5. Length: BMW M4 is 0.4 in shorter (184.9 in vs 184.5 in)

Practical verdicts

  • Easier to fit in a short garageBMW M4 — BMW M4 is shorter by 0.4 in Check garage fit for BMW i8 · garage fit for BMW M4
  • Narrower for tight parkingBMW M4 — BMW M4 is narrower by 2.9 in
  • Smaller exterior footprintBMW M4 — Based on length × width (BMW M4)

Dimension comparison

SpecBMW i8BMW M4Difference
Length184.9 in184.5 in0.4 in
Width76.5 in73.6 in2.9 in
Height50.8 in54.6 in3.8 in
Wheelbase110.2 in110.7 in0.5 in
Curb weight3,586 lb3,865 lb279 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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