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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 840i xDrive Convertible | BMW2025 BMW M4 Competition xDrive Convertible |
|---|---|---|
| Performance | ||
| Top speedHigher is better | 155 mphManufacturer claim · BMW | 174 mphBestIndependent test · Wikipedia |
| 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. | 169.5 hp/tCalculated | 267.8 hp/tBestCalculated |
| Acceleration | ||
| 0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers. | 4.60 sManufacturer claim · BMW | 3.20 sBestIndependent test · MotorTrend |
| 0–100 km/hLower is better | 4.90 sManufacturer claim · BMW | 3.70 sBestManufacturer claim · BMW |
| Engine & Powertrain | ||
| Peak powerHigher is better | 335 hpManufacturer claim · BMW | 523 hpBestIndependent test · MotorTrend |
| Peak torqueHigher is better | 368 lb-ftManufacturer claim · BMW | 479 lb-ftBestIndependent test · CarBuzz |
| Engine displacement | 2998.0 ccManufacturer claim · BMW | 2993.0 ccIndependent test · Wikipedia |
| Cylinder count | 6Manufacturer claim · BMW | 6Homologation · US EPA |
| Engine layout | Inline-6Manufacturer claim · BMW | Inline-6Independent test · Wikipedia |
| Engine placement | Front | |
| Dimensions | ||
| Length | 191 inManufacturer claim · BMW | — |
| Width | 75 inManufacturer claim · BMW | 74 inIndependent test · CarBuzz |
| Height | 53 inManufacturer claim · BMW | — |
| Wheelbase | 111 inManufacturer claim · BMW | — |
| Ground clearance | 5 inManufacturer claim · BMW | — |
| Weight | ||
| Curb weightLower is better | 4356 lbManufacturer claim · BMW | 4306 lbBestIndependent test · Wikipedia |
| Fuel Economy | ||
| Fuel economy (combined)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 24.0 mpgBestHomologation · US EPA | 18.0 mpgHomologation · US EPA |
| Fuel economy (city)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 21.0 mpgBestHomologation · US EPA | 16.0 mpgHomologation · US EPA |
| Fuel economy (highway)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 29.0 mpgBestHomologation · US EPA | 22.0 mpgHomologation · US EPA |
| Fuel tank capacity | 18.0 galManufacturer claim · BMW | — |
| Estimated range (combined)Estimated from tank capacity and quoted combined economy — not an instrumented range. | ||
| Practicality | ||
| Cargo volume | 12 ft³Manufacturer claim · BMW | — |
| Seats | 4Manufacturer claim · BMW | 4Independent test · MotorTrend |
| Pricing | ||
| Base price (as tested market)Demo prices only; not live FX. | $104,400Homologation · US EPA | $95,300Independent test · CarBuzz |
| Tires & Wheels | ||
| Front tire size | 245/45R18 A/SManufacturer claim · BMW | — |
| Rear tire size | 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.
| FrontIndependent test · Wikipedia |
| Induction type | TurbochargedManufacturer claim · BMW | Twin-turboIndependent test · Wikipedia |
|---|
| Redline | — | 7200Independent test · Wikipedia |
|---|
| Transmission type | Torque-converter automaticManufacturer claim · BMW | Torque-converter automaticIndependent test · Wikipedia |
|---|
| Number of gears | 8Manufacturer claim · BMW | 8Homologation · US EPA |
|---|
| — |
| Estimated range (highway)Estimated from tank capacity and quoted highway economy — not an instrumented range. | 522 miCalculated | — |
|---|
| Estimated range (city)Estimated from tank capacity and quoted city economy — not an instrumented range. | 378 miCalculated | — |
|---|