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Compare
Compare 2–4 cars side by side. Every figure is sourced; the best value in each comparable row is marked.
| Specification | BMW2025 BMW X7 xDrive40i | Porsche2025 Porsche Cayenne |
|---|---|---|
| Performance | ||
| Top speedHigher is better | 155 mphBestManufacturer claim · BMW | 154 mphManufacturer claim · Porsche |
| Power-to-weight ratioHigher is betterCalculated from peak power and curb weight — figures quoted against a different weight basis (e.g. dry or DIN) will differ. | 155.3 hp/tCalculated | 164.0 hp/tBestCalculated |
| Lateral accelerationSkidpad radius and surface affect results. | — | 1.02 gIndependent test · Car and Driver |
| Acceleration | ||
| 0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers. | 5.60 sTieManufacturer claim · BMW | 5.70 sTieManufacturer claim · Porsche |
| 0–100 km/hLower is better | 5.80 sBestManufacturer claim · BMW | 6.00 sManufacturer claim · Porsche |
| 0–100 mphLower is better | 12.70 sBestIndependent test · Car and Driver | 12.80 sIndependent test · Car and Driver |
| 0–200 km/h | — | 24.0 sManufacturer claim · Porsche |
| Quarter-mile elapsed time | — | 14.30 sManufacturer claim · Porsche |
| Braking | ||
| 70–0 mph braking distance | — | 152.0 ftIndependent test · Car and Driver |
| 100–0 mph braking distance | — | 304.0 ftIndependent test · Car and Driver |
| Engine & Powertrain | ||
| Peak powerHigher is better | 375 hpBestManufacturer claim · BMW | 348 hpManufacturer claim · Porsche |
| Peak torqueHigher is better | 398 lb-ftBestManufacturer claim · BMW | 368 lb-ftManufacturer claim · Porsche |
| Engine displacement | 2998.0 ccManufacturer claim · BMW | 3000.0 ccManufacturer claim · Porsche |
| Cylinder count | 6Manufacturer claim · BMW | 6Manufacturer claim · Porsche |
| Engine layout | Inline-6Manufacturer claim · BMW | V6Manufacturer claim · Porsche |
| Engine placement | FrontManufacturer claim · BMW | Front |
| Dimensions | ||
| Length | 204 inManufacturer claim · BMW | 194 inManufacturer claim · Porsche |
| Width | 79 inManufacturer claim · BMW | 79 inManufacturer claim · Porsche |
| Height | 72 inManufacturer claim · BMW | 67 inManufacturer claim · Porsche |
| Wheelbase | 122 inManufacturer claim · BMW | 114 inManufacturer claim · Porsche |
| Ground clearance | — | 8 inManufacturer claim · Porsche |
| Weight | ||
| Curb weightLower is better | 5324 lbManufacturer claim · BMW | 4678 lbBestManufacturer claim · Porsche |
| Fuel Economy | ||
| Fuel economy (combined)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 22.0 mpgBestHomologation · US EPA | 19.0 mpgHomologation · US EPA |
| Fuel economy (city)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 20.0 mpgBestHomologation · US EPA | 17.0 mpgHomologation · US EPA |
| Fuel economy (highway)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 24.0 mpgBestHomologation · US EPA | 23.0 mpgHomologation · US EPA |
| Fuel tank capacity | 21.9 galManufacturer claim · BMW | 23.7 galManufacturer claim · Porsche |
| Estimated range (combined)Higher is betterEstimated from tank capacity and quoted combined economy — not an instrumented range. | ||
| Practicality | ||
| Cargo volumeHigher is better | 11 ft³Manufacturer claim · BMW | 27 ft³BestManufacturer claim · Porsche |
| Seats | 7Manufacturer claim · BMW | 5Manufacturer claim · Porsche |
| Towing capacity (braked) | — | 7716 lbManufacturer claim · Porsche |
| Pricing | ||
| Base price (as tested market)Demo prices only; not live FX. | $84,300Homologation · US EPA | $84,700Homologation · US EPA |
| Aerodynamics | ||
| Drag coefficient (Cd) | — | 0.36 :1Manufacturer claim · Porsche |
| Tires & Wheels | ||
| Front tire size | — | 255/55 R20Manufacturer claim · Porsche |
| Rear tire size | — | 295/45 R20Manufacturer claim · Porsche |
Every figure is the car’s preferred, sourced value. “Best” marks the strongest value in a row, judged on the canonical measurement (so a winner is correct whichever unit system you view). Open a car to see each value’s source, original units, and alternates.
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Add a value with its source. An editor verifies every submission against its citation before it appears on the site.
| Induction type | TurbochargedManufacturer claim · BMW | TurbochargedManufacturer claim · Porsche |
|---|
| Redline | — | 6500Manufacturer claim · Porsche |
|---|
| Transmission type | Torque-converter automaticManufacturer claim · BMW | Torque-converter automaticManufacturer claim · Porsche |
|---|
| Number of gears | 8Manufacturer claim · BMW | 8Manufacturer claim · Porsche |
|---|
| 450 miCalculated |
| Estimated range (highway)Higher is betterEstimated from tank capacity and quoted highway economy — not an instrumented range. | 526 miCalculated | 545 miBestCalculated |
|---|
| Estimated range (city)Higher is betterEstimated from tank capacity and quoted city economy — not an instrumented range. | 439 miBestCalculated | 403 miCalculated |
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