Mercedes-Benz AMG GT 55 vs Porsche 718 Cayman
Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.
Vehicles
Vehicles
2025 Porsche 718 Cayman
Overview
| Spec | Mercedes-Benz AMG GT 5555 | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Selected trim | 55 | 718 Cayman Coupe |
| Body style | Coupe | Coupe |
| Drivetrain | all wheel drive | rear wheel drive |
| Fuel type | premium unleaded (required) | premium unleaded (required) |
| Transmission | 9-speed shiftable automatic | 7-speed automated manual |
| Engine type | gas | gas |
| Model year | 2026 | 2025 |
Pricing & market
| Spec | Mercedes-Benz AMG GT 5555 | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| MSRP | $138,150 | $72,800 (best) |
| Lowest listing price | — | $113,999 (best) |
| Median listing price | — | $151,795 (best) |
| Highest listing price | — | $189,590 (best) |
| For sale now | 0 | 2 (best) |
Fuel economy & range
| Spec | Mercedes-Benz AMG GT 5555 | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Combined MPG | 16 MPG | 24 MPG (best) |
| City MPG | 14 MPG | 21 MPG (best) |
| Highway MPG | 20 MPG | 27 MPG (best) |
| Fuel tank | 18.5 gal (best) | 14.2 gal |
Performance
| Spec | Mercedes-Benz AMG GT 5555 | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Horsepower | 469 hp (best) | 300 hp |
| Torque | 516 lb-ft (best) | 280 lb-ft |
| Engine size | 4 L (best) | 2 L |
| Cylinders | V8 | flat 4 |
Size & capability
| Spec | Mercedes-Benz AMG GT 5555 | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Seating | 4 seats (best) | 2 seats |
| Doors | 2 | 2 |
| Cargo volume | 23.8 cu ft (best) | 15 cu ft |
| Payload | — | 611 lbs (best) |
| Curb weight | 4,343 lbs | 3,104 lbs (best) |
| Wheelbase | 106.3 in (best) | 97.4 in |
| Length | 186.1 in (best) | 172.4 in |
| Width | 78.1 in (best) | 70.9 in |
| Height | 53.3 in (best) | 51 in |
Safety & recalls
| Spec | Mercedes-Benz AMG GT 5555 | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Open recalls (YMM scope) | None reported | None reported |
Highlighted values indicate the better figure for that spec when a clear winner exists. Specs reflect the selected trim for each vehicle. Drag a vehicle header to reorder columns. MSRP and specifications are manufacturer data; listing prices and inventory come from live dealer listings. Safety ratings are from NHTSA.
Trim overview
All available trims with MSRP. The trim selected above is highlighted; comparison specs use that selection.
| Trim | Mercedes-Benz AMG GT 55 | Porsche 718 Cayman |
|---|---|---|
| 1 | 55 $138,150 MSRP(Currently comparing) | 718 Cayman Coupe $72,800 MSRP(Currently comparing) |
| 2 | — | Style Edition $79,200 MSRP |
| 3 | — | S $84,800 MSRP |
| 4 | — | GTS 4.0 $99,700 MSRP |
| 5 | — | GT4 RS $164,200 MSRP |
Live inventory
Mercedes-Benz AMG GT 55 vs Porsche 718 Cayman FAQ
- Which is better: 2026 Mercedes-Benz AMG GT 55 or 2025 Porsche 718 Cayman?
- It depends on priorities. OpenDealer compares 2026 Mercedes-Benz AMG GT 55 vs 2025 Porsche 718 Cayman on MSRP, fuel economy, horsepower, seating, towing, NHTSA safety ratings, and live market prices so you can weigh the tradeoffs.
- Which costs less: 2026 Mercedes-Benz AMG GT 55 or 2025 Porsche 718 Cayman?
- Based on starting MSRP, the 2025 Porsche 718 Cayman starts lower at $72,800. Live Porsche 718 Cayman listings start at $113,999.
- Which has better startingMsrp: 2026 Mercedes-Benz AMG GT 55 or 2025 Porsche 718 Cayman?
- The 2025 Porsche 718 Cayman leads on startingMsrp in this comparison (72,800).
- Which has better combinedMpg: 2026 Mercedes-Benz AMG GT 55 or 2025 Porsche 718 Cayman?
- The 2025 Porsche 718 Cayman leads on combinedMpg in this comparison (24).
- Which has better horsepower: 2026 Mercedes-Benz AMG GT 55 or 2025 Porsche 718 Cayman?
- The 2025 Porsche 718 Cayman leads on horsepower in this comparison (493).
- Which has better seats: 2026 Mercedes-Benz AMG GT 55 or 2025 Porsche 718 Cayman?
- The 2026 Mercedes-Benz AMG GT 55 leads on seats in this comparison (4).