Spec Sizes

Audi R8 vs Porsche 911 Dimensions & Size Comparison

Comparing 2021 catalog dimensions. Audi R8 · Porsche 911

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

Side view
  • Length174.4 in
  • Height48.7 in – 48.9 in
  • Wheelbase104.3 in
  • Curb weight3,594 lb – 3,913 lb
Front / width
  • Width76.4 in
  • Porsche 911 width72.9 in – 74.9 in

Which is bigger?

  • Length: Audi R8 is 3.8 in shorter (174.4 in vs 178.3 in)
  • Width: Porsche 911 is 2.5 in narrower (76.4 in vs 73.9 in)
  • Height: Porsche 911 is 2.4 in taller (48.8 in vs 51.2 in)
  • Wheelbase: Audi R8 has a 7.8 in longer wheelbase (104.3 in vs 96.5 in)
  • Curb weight: Audi R8 is 182 lb heavier (3,754 lb vs 3,572 lb)

Biggest size differences

  1. Wheelbase: Audi R8 has a 7.8 in longer wheelbase (104.3 in vs 96.5 in)
  2. Curb weight: Audi R8 is 182 lb heavier (3,754 lb vs 3,572 lb)
  3. Height: Porsche 911 is 2.4 in taller (48.8 in vs 51.2 in)
  4. Width: Porsche 911 is 2.5 in narrower (76.4 in vs 73.9 in)
  5. Length: Audi R8 is 3.8 in shorter (174.4 in vs 178.3 in)

Practical verdicts

  • Easier to fit in a short garageAudi R8 — Audi R8 is shorter by 3.8 in Check garage fit for Audi R8 · garage fit for Porsche 911
  • Narrower for tight parkingPorsche 911 — Porsche 911 is narrower by 2.5 in
  • Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)

Dimension comparison

SpecAudi R8Porsche 911Difference
Length174.4 in178.3 in3.8 in
Width76.4 in73.9 in2.5 in
Height48.8 in51.2 in2.4 in
Wheelbase104.3 in96.5 in7.8 in
Curb weight3,754 lb3,572 lb182 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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