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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 M2 | Porsche2025 Porsche 718 Cayman S |
|---|---|---|
| Performance | ||
| Top speedHigher is better | 177 mphTieManufacturer claim · BMW | 177 mphTieManufacturer 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. | 269.7 hp/tBestCalculated | 252.7 hp/tCalculated |
| Lateral accelerationHigher is betterSkidpad radius and surface affect results. | 1.02 gIndependent test · Car and Driver | 1.04 gBestIndependent test · Car and Driver |
| Acceleration | ||
| 0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers. | 3.50 sBestIndependent test · Car and Driver | 4.20 sManufacturer claim · Porsche |
| 0–100 km/hLower is better | 4.00 sBestManufacturer claim · BMW | 4.40 sIndependent test · Wikipedia |
| 0–100 mphLower is better | 7.60 sBestIndependent test · Car and Driver | 9.30 sIndependent test · Car and Driver |
| 0–200 km/hLower is better | 12.9 sBestManufacturer claim · BMW | 15.0 sManufacturer claim · Porsche |
| Quarter-mile elapsed timeLower is better | 11.60 sBestIndependent test · Car and Driver | 12.60 sManufacturer claim · Porsche |
| Braking | ||
| 70–0 mph braking distanceLower is better | 149.0 ftIndependent test · Car and Driver | 144.0 ftBestIndependent test · Car and Driver |
| 100–0 mph braking distance | 294.0 ftIndependent test · Car and Driver | — |
| Engine & Powertrain | ||
| Peak powerHigher is better | 473 hpBestManufacturer claim · BMW | 350 hpManufacturer claim · Porsche |
| Peak torqueHigher is better | 443 lb-ftBestManufacturer claim · BMW | 309 lb-ftManufacturer claim · Porsche |
| Engine displacement | 2993.0 ccManufacturer claim · BMW | 2497.0 ccManufacturer claim · Porsche |
| Cylinder count | 6Manufacturer claim · BMW | 4Manufacturer claim · Porsche |
| Engine layout | Inline-6Manufacturer claim · BMW | Flat-4Manufacturer claim · Porsche |
| Engine placement | FrontIndependent test · Car and Driver | Mid |
| Dimensions | ||
| Length | 180 inManufacturer claim · BMW | 172 inManufacturer claim · Porsche |
| Width | 74 inManufacturer claim · BMW | 71 inManufacturer claim · Porsche |
| Height | 55 inManufacturer claim · BMW | 51 inManufacturer claim · Porsche |
| Wheelbase | 108 inManufacturer claim · BMW | 97 inManufacturer claim · Porsche |
| Weight | ||
| Curb weightLower is better | 3867 lbManufacturer claim · BMW | 3054 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. | 19.0 mpgHomologation · US EPA | 22.0 mpgBestHomologation · US EPA |
| Fuel economy (city)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 16.0 mpgHomologation · US EPA | 19.0 mpgBestHomologation · US EPA |
| Fuel economy (highway)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 23.0 mpgHomologation · US EPA | 25.0 mpgBestHomologation · US EPA |
| Fuel tank capacity | 13.7 galHomologation · US EPA | 16.9 galManufacturer claim · Porsche |
| Estimated range (combined)Higher is betterEstimated from tank capacity and quoted combined economy — not an instrumented range. | 260 mi | |
| Practicality | ||
| Seats | 4Independent test · Car and Driver | 2Homologation · US EPA |
| Pricing | ||
| Base price (as tested market)Demo prices only; not live FX. | $65,500Homologation · US EPA | $84,800Homologation · US EPA |
| Tires & Wheels | ||
| Front tire size | 275/35 ZR19Manufacturer claim · BMW | 235/40 ZR19Manufacturer claim · Porsche |
| Rear tire size | 285/30 ZR20Manufacturer claim · BMW | 265/40 ZR19Manufacturer 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.
Community index
Add a value with its source. An editor verifies every submission against its citation before it appears on the site.
| Quarter-mile trap speed | 124.0 mphIndependent test · Car and Driver | — |
|---|
| Induction type | Twin-turboManufacturer claim · BMW | TurbochargedManufacturer claim · Porsche |
|---|
| RedlineHigher is better | 7200Manufacturer claim · BMW | 7500BestManufacturer claim · Porsche |
|---|
| Transmission type | Torque-converter automaticManufacturer claim · BMW | ManualManufacturer claim · Porsche |
|---|
| Number of gears | 8Manufacturer claim · BMW | 6Manufacturer claim · Porsche |
|---|
| 372 miBestCalculated |
| Estimated range (highway)Higher is betterEstimated from tank capacity and quoted highway economy — not an instrumented range. | 315 miCalculated | 423 miBestCalculated |
|---|
| Estimated range (city)Higher is betterEstimated from tank capacity and quoted city economy — not an instrumented range. | 219 miCalculated | 321 miBestCalculated |
|---|