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Mercedes-Benz C43 AMG vs Porsche 718 Cayman

Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.

Vehicles

Mercedes-Benz logo

2026 Mercedes-Benz C43 AMG

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Porsche logo

2025 Porsche 718 Cayman

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Overview

SpecMercedes-Benz C43 AMGAMG C 43Porsche 718 Cayman718 Cayman Coupe
Selected trimAMG C 43718 Cayman Coupe
Body styleSedanCoupe
Drivetrainall wheel driverear wheel drive
Fuel typepremium unleaded (required)premium unleaded (required)
Transmission9-speed shiftable automatic7-speed automated manual
Engine typemild hybridgas
Model year20262025

Pricing & market

SpecMercedes-Benz C43 AMGAMG C 43Porsche 718 Cayman718 Cayman Coupe
MSRP$64,150 (best)$72,800
Lowest listing price—$54,739 (best)
Median listing price—$114,999 (best)
Highest listing price—$189,900 (best)
For sale now03 (best)

Fuel economy & range

SpecMercedes-Benz C43 AMGAMG C 43Porsche 718 Cayman718 Cayman Coupe
Combined MPG22 MPG24 MPG (best)
City MPG19 MPG21 MPG (best)
Highway MPG27 MPG27 MPG
Fuel tank17.4 gal (best)14.2 gal

Performance

SpecMercedes-Benz C43 AMGAMG C 43Porsche 718 Cayman718 Cayman Coupe
Horsepower416 hp (best)300 hp
Torque369 lb-ft (best)280 lb-ft
Engine size2 L2 L
CylindersI4flat 4

Size & capability

SpecMercedes-Benz C43 AMGAMG C 43Porsche 718 Cayman718 Cayman Coupe
Seating5 seats (best)2 seats
Doors4 (best)2
Cargo volume11.6 cu ft15 cu ft (best)
Payload—611 lbs (best)
Curb weight4,165 lbs3,104 lbs (best)
Wheelbase112.8 in (best)97.4 in
Length188.6 in (best)172.4 in
Width74.4 in (best)70.9 in
Height57.1 in (best)51 in

Safety & recalls

SpecMercedes-Benz C43 AMGAMG C 43Porsche 718 Cayman718 Cayman Coupe
Open recalls (YMM scope)None reportedNone 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.

TrimMercedes-Benz C43 AMGPorsche 718 Cayman
1

AMG C 43

$64,150 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 C43 AMG vs Porsche 718 Cayman FAQ

Which is better: 2026 Mercedes-Benz C43 AMG or 2025 Porsche 718 Cayman?
It depends on priorities. OpenDealer compares 2026 Mercedes-Benz C43 AMG 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 C43 AMG or 2025 Porsche 718 Cayman?
Based on starting MSRP, the 2026 Mercedes-Benz C43 AMG starts lower at $64,150. Live Porsche 718 Cayman listings start at $54,739.
Which has better startingMsrp: 2026 Mercedes-Benz C43 AMG or 2025 Porsche 718 Cayman?
The 2026 Mercedes-Benz C43 AMG leads on startingMsrp in this comparison (64,150).
Which has better combinedMpg: 2026 Mercedes-Benz C43 AMG or 2025 Porsche 718 Cayman?
The 2025 Porsche 718 Cayman leads on combinedMpg in this comparison (24).
Which has better horsepower: 2026 Mercedes-Benz C43 AMG or 2025 Porsche 718 Cayman?
The 2025 Porsche 718 Cayman leads on horsepower in this comparison (493).
Which has better seats: 2026 Mercedes-Benz C43 AMG or 2025 Porsche 718 Cayman?
The 2026 Mercedes-Benz C43 AMG leads on seats in this comparison (5).