Porsche 911 vs Cadillac XLR Dimensions & Size Comparison
Comparing 2004 catalog dimensions. Porsche 911 · Cadillac XLR
- Length174.5 in – 175.0 in
- Height50.2 in – 51.4 in
- Wheelbase92.5 in – 92.7 in
- Ground clearance4.3 in
- Curb weight2,959 lb – 3,428 lb
- Width69.7 in – 72.0 in
- Cadillac XLR width72.3 in
Which is bigger?
- Length: Porsche 911 is 2.9 in shorter (174.8 in vs 177.7 in)
- Width: Porsche 911 is 1.5 in narrower (70.8 in vs 72.3 in)
- Height: Porsche 911 is 0.4 in taller (50.8 in vs 50.4 in)
- Wheelbase: Cadillac XLR has a 13.1 in longer wheelbase (92.6 in vs 105.7 in)
- Curb weight: Cadillac XLR is 454 lb heavier (3,194 lb vs 3,647 lb)
Biggest size differences
- Curb weight: Cadillac XLR is 454 lb heavier (3,194 lb vs 3,647 lb)
- Wheelbase: Cadillac XLR has a 13.1 in longer wheelbase (92.6 in vs 105.7 in)
- Width: Porsche 911 is 1.5 in narrower (70.8 in vs 72.3 in)
- Length: Porsche 911 is 2.9 in shorter (174.8 in vs 177.7 in)
- Height: Porsche 911 is 0.4 in taller (50.8 in vs 50.4 in)
Practical verdicts
- Easier to fit in a short garagePorsche 911 — Porsche 911 is shorter by 2.9 in Check garage fit for Porsche 911 · garage fit for Cadillac XLR
- Narrower for tight parkingPorsche 911 — Porsche 911 is narrower by 1.5 in
- Smaller exterior footprintPorsche 911 — Based on length × width (Porsche 911)
Dimension comparison
| Spec | Porsche 911 | Cadillac XLR | Difference |
|---|---|---|---|
| Length | 174.8 in | 177.7 in | 2.9 in |
| Width | 70.8 in | 72.3 in | 1.5 in |
| Height | 50.8 in | 50.4 in | 0.4 in |
| Wheelbase | 92.6 in | 105.7 in | 13.1 in |
| Ground clearance | 4.3 in | — | — |
| Curb weight | 3,194 lb | 3,647 lb | 454 lb |
Values use trim midpoints when a model year lists a range (e.g. length 174.5 in – 175.0 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.