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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 | Audi2027 Audi S8 quattro | Mercedes-Benz2026 Mercedes-Benz S 580 4MATIC Sedan |
|---|---|---|
| Performance | ||
| Top speedHigher is better | 155 mphBestManufacturer claim · Audi of America | 130 mphManufacturer claim · Mercedes-Benz USA |
| 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. | 242.2 hp/tBestCalculated | 228.0 hp/tCalculated |
| Lateral accelerationSkidpad radius and surface affect results. | — | 0.87 gIndependent test · Car and Driver |
| Acceleration | ||
| 0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers. | 3.80 sBestManufacturer claim · Audi of America | 4.30 sManufacturer claim · Mercedes-Benz USA |
| 0–100 km/hLower is better | 3.80 sBestManufacturer claim · Audi of America | 4.40 sManufacturer claim · Mercedes-Benz USA |
| 0–100 mph | — | 9.70 sIndependent test · Car and Driver |
| 0–200 km/h | 13.6 sIndependent test · auto motor und sport | — |
| Braking | ||
| 70–0 mph braking distanceLower is better | 162.0 ftBestIndependent test · Car and Driver | 168.0 ftIndependent test · Car and Driver |
| 100–0 mph braking distance | — | 350.0 ftIndependent test · Car and Driver |
| Engine & Powertrain | ||
| Peak powerHigher is better | 563 hpBestManufacturer claim · Audi of America | 496 hpManufacturer claim · Mercedes-Benz USA |
| Peak torqueHigher is better | 590 lb-ftBestManufacturer claim · Audi of America | 516 lb-ftManufacturer claim · Mercedes-Benz USA |
| Engine displacement | 4000.0 ccManufacturer claim · Audi of America | 4000.0 ccManufacturer claim · Mercedes-Benz USA |
| Cylinder count | 8Manufacturer claim · Audi of America | 8Manufacturer claim · Mercedes-Benz USA |
| Engine layout | V8Manufacturer claim · Audi of America | V8Manufacturer claim · Mercedes-Benz USA |
| Induction type | Turbocharged | |
| Dimensions | ||
| Length | — | 210 inManufacturer claim · Mercedes-Benz USA |
| Width | — | 76 inManufacturer claim · Mercedes-Benz USA |
| Height | — | 59 inManufacturer claim · Mercedes-Benz USA |
| Wheelbase | — | 127 inManufacturer claim · Mercedes-Benz USA |
| Weight | ||
| Curb weightLower is better | 5125 lbManufacturer claim · Audi of America | 4795 lbBestManufacturer claim · Mercedes-Benz USA |
| Fuel Economy | ||
| Fuel economy (combined)Lower L/100km is better; higher mpg is better — direction is on the canonical L/100km. | 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. | 15.0 mpgHomologation · US EPA | 17.0 mpgBestManufacturer claim · Mercedes-Benz USA |
| 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 | 27.0 mpgBestManufacturer claim · Mercedes-Benz USA |
| Fuel tank capacity | — | 20.0 galManufacturer claim · Mercedes-Benz USA |
| Estimated range (highway)Estimated from tank capacity and quoted highway economy — not an instrumented range. | — | 540 mi |
| Practicality | ||
| Cargo volume | — | 13 ft³Manufacturer claim · Mercedes-Benz USA |
| Seats | — | 5Manufacturer claim · Mercedes-Benz USA |
| Pricing | ||
| Base price (as tested market)Demo prices only; not live FX. | $130,000Manufacturer claim · Audi of America | $130,700Manufacturer claim · Mercedes-Benz USA |
| Aerodynamics | ||
| Drag coefficient (Cd) | — | 0.22 :1Manufacturer claim · Mercedes-Benz USA |
| Tires & Wheels | ||
| Front tire size | — | 255/45R19Manufacturer claim · Mercedes-Benz USA |
| Rear tire size | — | 255/45R19Manufacturer claim · Mercedes-Benz USA |
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.
| Twin-turboManufacturer claim · Mercedes-Benz USA |
| Transmission type | Torque-converter automaticManufacturer claim · Audi of America | Torque-converter automaticManufacturer claim · Mercedes-Benz USA |
|---|
| Number of gears | 8Manufacturer claim · Audi of America | 9Manufacturer claim · Mercedes-Benz USA |
|---|
| Estimated range (city)Estimated from tank capacity and quoted city economy — not an instrumented range. | — | 340 miCalculated |
|---|