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Compare 2–4 cars side by side. Every figure is sourced; the best value in each comparable row is marked.
| Specification | BMW2014 BMW i8 Coupe (I12) | Mercedes-Benz2026 Mercedes-AMG GT 55 Coupe |
|---|---|---|
| Performance | ||
| Top speedHigher is better | 155 mphIndependent test · Wikipedia | 183 mphBestManufacturer 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. | 231.9 hp/tCalculated | 238.1 hp/tBestCalculated |
| Acceleration | ||
| 0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers. | 3.80 sTieIndependent test · Car and Driver | 3.80 sTieManufacturer claim · Mercedes-Benz USA |
| 0–100 km/hLower is better | 4.40 sIndependent test · Wikipedia | 3.90 sBestManufacturer claim · Mercedes-Benz USA |
| 0–100 mph | 9.60 sIndependent test · Car and Driver | — |
| Braking | ||
| 70–0 mph braking distance | 166.0 ftIndependent test · Car and Driver | — |
| Engine & Powertrain | ||
| Peak powerHigher is better | 357 hpIndependent test · Wikipedia | 469 hpBestManufacturer claim · Mercedes-Benz USA |
| Peak torqueHigher is better | 420 lb-ftIndependent test · Wikipedia | 516 lb-ftBestManufacturer claim · Mercedes-Benz USA |
| Engine displacement | 1499.0 ccIndependent test · Wikipedia | 4000.0 ccManufacturer claim · Mercedes-Benz USA |
| Cylinder count | 3Independent test · Wikipedia | 8Manufacturer claim · Mercedes-Benz USA |
| Engine layout | Inline-3Independent test · Wikipedia | V8Manufacturer claim · Mercedes-Benz USA |
| Engine placement | MidIndependent test · Wikipedia | |
| Dimensions | ||
| Length | 185 inIndependent test · Wikipedia | 186 inManufacturer claim · Mercedes-Benz USA |
| Width | 77 inIndependent test · Wikipedia | 78 inManufacturer claim · Mercedes-Benz USA |
| Height | 51 inIndependent test · Wikipedia | 53 inManufacturer claim · Mercedes-Benz USA |
| Wheelbase | 110 inIndependent test · Wikipedia | 106 inManufacturer claim · Mercedes-Benz USA |
| Weight | ||
| Curb weightLower is better | 3394 lbBestIndependent test · Wikipedia | 4343 lbManufacturer claim · Mercedes-Benz USA |
| Fuel Economy | ||
| Fuel tank capacity | — | 18.5 galManufacturer claim · Mercedes-Benz USA |
| Electric System | ||
| Battery gross capacity | 7.1 kWhIndependent test · Wikipedia | — |
| EPA range | 15 miIndependent test · Wikipedia | — |
| Practicality | ||
| Cargo volume | — | 11 ft³Manufacturer claim · Mercedes-Benz USA |
| Seats | 4Independent test · Wikipedia | 2Manufacturer claim · Mercedes-Benz USA |
| Pricing | ||
| Base price (as tested market)Demo prices only; not live FX. | — | $138,150Manufacturer claim · Mercedes-Benz USA |
| Tires & Wheels | ||
| Front tire size | — | 295/30R20Manufacturer claim · Mercedes-Benz USA |
| Rear tire size | — | 305/30R20Manufacturer 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.
Community index
Add a value with its source. An editor verifies every submission against its citation before it appears on the site.
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| Induction type | TurbochargedIndependent test · Wikipedia | Twin-turboManufacturer claim · Mercedes-Benz USA |
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| Transmission type | Torque-converter automaticIndependent test · Wikipedia | — |
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| Number of gears | 6Independent test · Wikipedia | 9Manufacturer claim · Mercedes-Benz USA |
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