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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 | Porsche2025 Porsche 718 Cayman GTS 4.0 | BMW2025 BMW 840i xDrive Coupe |
|---|---|---|
| Performance | ||
| Top speedHigher is better | 182 mphBestManufacturer claim · Porsche | 155 mphManufacturer claim · BMW |
| 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. | 275.1 hp/tBestCalculated | 181.0 hp/tCalculated |
| Lateral accelerationSkidpad radius and surface affect results. | 1.04 gIndependent test · Car and Driver | — |
| Acceleration | ||
| 0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers. | 4.30 sTieManufacturer claim · Porsche | 4.40 sTieManufacturer claim · BMW |
| 0–100 km/hLower is better | 4.00 sBestIndependent test · Wikipedia | 4.70 sManufacturer claim · BMW |
| 0–100 mph | 8.50 sIndependent test · Car and Driver | — |
| 0–200 km/h | 14.1 sManufacturer claim · Porsche | — |
| Quarter-mile elapsed time | 12.50 sManufacturer claim · Porsche | — |
| Braking | ||
| 70–0 mph braking distance | 142.0 ftIndependent test · Car and Driver | — |
| 100–0 mph braking distance | 284.0 ftIndependent test · Car and Driver | — |
| Engine & Powertrain | ||
| Peak powerHigher is better | 394 hpBestManufacturer claim · Porsche | 335 hpManufacturer claim · BMW |
| Peak torqueHigher is better | 309 lb-ftManufacturer claim · Porsche | 368 lb-ftBestManufacturer claim · BMW |
| Engine displacement | 3995.0 ccManufacturer claim · Porsche | 2998.0 ccManufacturer claim · BMW |
| Cylinder count | 6Manufacturer claim · Porsche | 6Manufacturer claim · BMW |
| Engine layout | Flat-6Manufacturer claim · Porsche | Inline-6Manufacturer claim · BMW |
| Engine placement | MidManufacturer claim · Porsche | |
| Dimensions | ||
| Length | 172 inManufacturer claim · Porsche | 191 inManufacturer claim · BMW |
| Width | 71 inManufacturer claim · Porsche | 75 inManufacturer claim · BMW |
| Height | 50 inManufacturer claim · Porsche | 53 inManufacturer claim · BMW |
| Wheelbase | 97 inManufacturer claim · Porsche | 111 inManufacturer claim · BMW |
| Ground clearance | — | 5 inManufacturer claim · BMW |
| Weight | ||
| Curb weightLower is better | 3157 lbBestManufacturer claim · Porsche | 4081 lbManufacturer claim · BMW |
| Fuel Economy | ||
| Fuel economy (combined)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 21.0 mpgHomologation · US EPA | 24.0 mpgBestHomologation · US EPA |
| Fuel economy (city)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 19.0 mpgHomologation · US EPA | 21.0 mpgBestHomologation · 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 mpgHomologation · US EPA | 29.0 mpgBestHomologation · US EPA |
| Fuel tank capacity | 16.9 galManufacturer claim · Porsche | 18.0 galManufacturer claim · BMW |
| Estimated range (combined)Higher is betterEstimated from tank capacity and quoted combined economy — not an instrumented range. | ||
| Practicality | ||
| Cargo volumeHigher is better | 5 ft³Manufacturer claim · Porsche | 15 ft³BestManufacturer claim · BMW |
| Seats | 2Homologation · US EPA | 4Manufacturer claim · BMW |
| Pricing | ||
| Base price (as tested market)Demo prices only; not live FX. | $99,700Homologation · US EPA | $94,700Homologation · US EPA |
| Tires & Wheels | ||
| Front tire size | 235/35 ZR20Manufacturer claim · Porsche | 245/45R18 A/SManufacturer claim · BMW |
| Rear tire size | 265/35 ZR20Manufacturer claim · Porsche | 275/40R18 A/SManufacturer claim · BMW |
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.
Community index
Add a value with its source. An editor verifies every submission against its citation before it appears on the site.
| FrontManufacturer claim · BMW |
| Induction type | Naturally aspiratedManufacturer claim · Porsche | TurbochargedManufacturer claim · BMW |
|---|
| Redline | 7800Manufacturer claim · Porsche | — |
|---|
| Transmission type | ManualManufacturer claim · Porsche | Torque-converter automaticManufacturer claim · BMW |
|---|
| Number of gears | 6Manufacturer claim · Porsche | 8Manufacturer claim · BMW |
|---|
| 355 miCalculated |
| 432 miBestCalculated |
| Estimated range (highway)Higher is betterEstimated from tank capacity and quoted highway economy — not an instrumented range. | 406 miCalculated | 522 miBestCalculated |
|---|
| Estimated range (city)Higher is betterEstimated from tank capacity and quoted city economy — not an instrumented range. | 321 miCalculated | 378 miBestCalculated |
|---|