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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 | Mercedes-Benz2026 Mercedes-Maybach S 680 4MATIC | BMW2025 BMW M340i xDrive |
|---|---|---|
| Performance | ||
| Top speedHigher is better | 130 mphTieManufacturer claim · Mercedes-Benz USA | 130 mphTieManufacturer 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. | 262.6 hp/tBestCalculated | 212.3 hp/tCalculated |
| Lateral accelerationHigher is betterSkidpad radius and surface affect results. | 0.92 gIndependent test · Car and Driver | 0.95 gBestIndependent test · Car and Driver |
| Acceleration | ||
| 0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers. | 4.30 sManufacturer claim · Mercedes-Benz USA | 4.10 sBestManufacturer claim · BMW |
| 0–100 km/h | 4.50 sManufacturer claim · Mercedes-Benz USA | — |
| 0–100 mphLower is better | 8.30 sBestIndependent test · Car and Driver | 9.50 sIndependent test · Car and Driver |
| Braking | ||
| 70–0 mph braking distanceLower is better | 165.0 ftIndependent test · Car and Driver | 157.0 ftBestIndependent test · Car and Driver |
| 100–0 mph braking distanceLower is better | 331.0 ftIndependent test · Car and Driver | 310.0 ftBestIndependent test · Car and Driver |
| Engine & Powertrain | ||
| Peak powerHigher is better | 621 hpBestManufacturer claim · Mercedes-Benz USA | 386 hpManufacturer claim · BMW |
| Peak torqueHigher is better | 664 lb-ftBestManufacturer claim · Mercedes-Benz USA | 398 lb-ftManufacturer claim · BMW |
| Engine displacement | 6000.0 ccManufacturer claim · Mercedes-Benz USA | 2998.0 ccManufacturer claim · BMW |
| Cylinder count | 12Manufacturer claim · Mercedes-Benz USA | 6Manufacturer claim · BMW |
| Engine layout | V12Manufacturer claim · Mercedes-Benz USA | Inline-6Manufacturer claim · BMW |
| Engine placement | — | |
| Dimensions | ||
| Length | 215 inManufacturer claim · Mercedes-Benz USA | 186 inManufacturer claim · BMW |
| Width | 76 inManufacturer claim · Mercedes-Benz USA | 72 inManufacturer claim · BMW |
| Height | 59 inManufacturer claim · Mercedes-Benz USA | 57 inManufacturer claim · BMW |
| Wheelbase | 134 inManufacturer claim · Mercedes-Benz USA | 112 inManufacturer claim · BMW |
| Ground clearance | — | 5 inManufacturer claim · BMW |
| Weight | ||
| Curb weightLower is better | 5214 lbManufacturer claim · Mercedes-Benz USA | 4008 lbBestManufacturer claim · BMW |
| Fuel Economy | ||
| Fuel economy (combined)Lower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | — | 29.0 mpgHomologation · US EPA |
| Fuel economy (city)Lower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | — | 26.0 mpgHomologation · US EPA |
| Fuel economy (highway)Lower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | — | 33.0 mpgHomologation · US EPA |
| Fuel tank capacity | 20.1 galManufacturer claim · Mercedes-Benz USA | 15.6 galManufacturer claim · BMW |
| Estimated range (combined)Estimated from tank capacity and quoted combined economy — not an instrumented range. | — | 452 miCalculated |
| Estimated range (highway)Estimated from tank capacity and quoted highway economy — not an instrumented range. | ||
| Practicality | ||
| Cargo volumeHigher is better | 12 ft³Manufacturer claim · Mercedes-Benz USA | 17 ft³BestManufacturer claim · BMW |
| Seats | 5Manufacturer claim · Mercedes-Benz USA | 5Independent test · Wikipedia |
| Pricing | ||
| Base price (as tested market)Demo prices only; not live FX. | $244,400Manufacturer claim · Mercedes-Benz USA | $62,200Homologation · US EPA |
| Aerodynamics | ||
| Drag coefficient (Cd) | 0.25 :1Manufacturer claim · Mercedes-Benz USA | — |
| Tires & Wheels | ||
| Front tire size | 255/40R20Manufacturer claim · Mercedes-Benz USA | 225/40 R19Manufacturer claim · BMW |
| Rear tire size | 255/40R20Manufacturer claim · Mercedes-Benz USA | 225/40 R19Manufacturer 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 | Twin-turboManufacturer claim · Mercedes-Benz USA | TurbochargedManufacturer claim · BMW |
|---|
| Transmission type | Torque-converter automaticManufacturer claim · Mercedes-Benz USA | Torque-converter automaticManufacturer claim · BMW |
|---|
| Number of gears | 9Manufacturer claim · Mercedes-Benz USA | 8Manufacturer claim · BMW |
|---|
| — |
| 515 miCalculated |
| Estimated range (city)Estimated from tank capacity and quoted city economy — not an instrumented range. | — | 406 miCalculated |
|---|