Spec Sizes

Cadillac XLR vs Porsche 911 Dimensions & Size Comparison

Comparing 2009 catalog dimensions. Cadillac XLR · Porsche 911

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

Side view
  • Length177.7 in
  • Height50.4 in
  • Wheelbase105.7 in
  • Curb weight3,647 lb
Front / width
  • Width72.3 in
  • Porsche 911 width71.2 in – 72.9 in

Which is bigger?

  • Length: Porsche 911 is 1.8 in shorter (177.7 in vs 175.9 in)
  • Width: Porsche 911 is 0.2 in narrower (72.3 in vs 72.1 in)
  • Height: Porsche 911 is 1.0 in taller (50.4 in vs 51.4 in)
  • Wheelbase: Cadillac XLR has a 13.2 in longer wheelbase (105.7 in vs 92.5 in)
  • Curb weight: Cadillac XLR is 363 lb heavier (3,647 lb vs 3,285 lb)

Biggest size differences

  1. Wheelbase: Cadillac XLR has a 13.2 in longer wheelbase (105.7 in vs 92.5 in)
  2. Curb weight: Cadillac XLR is 363 lb heavier (3,647 lb vs 3,285 lb)
  3. Height: Porsche 911 is 1.0 in taller (50.4 in vs 51.4 in)
  4. Length: Porsche 911 is 1.8 in shorter (177.7 in vs 175.9 in)
  5. Width: Porsche 911 is 0.2 in narrower (72.3 in vs 72.1 in)

Practical verdicts

  • Easier to fit in a short garagePorsche 911 — Porsche 911 is shorter by 1.8 in Check garage fit for Cadillac XLR · garage fit for Porsche 911
  • Narrower for tight parkingPorsche 911 — Porsche 911 is narrower by 0.2 in
  • Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)

Dimension comparison

SpecCadillac XLRPorsche 911Difference
Length177.7 in175.9 in1.8 in
Width72.3 in72.1 in0.2 in
Height50.4 in51.4 in1.0 in
Wheelbase105.7 in92.5 in13.2 in
Ground clearance—4.0 in—
Curb weight3,647 lb3,285 lb363 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.