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TL;DR

Porsche 718 Cayman (982) S
Biggest reasons are Configuration (Flat 4) and Transmission (manual 6-speed).
Toyota Supra (A90) 3.0Smart Money, Pragmatists
Biggest reasons are MSRP (+30%), Fuel Economy (+29%), and Displacement (+20%).
Spec Porsche 718 Cayman (982) S Toyota Supra (A90) 3.0 Difference
Model Years 2017–2025 2021–2026
Release Date 2017-12-08 2020-08-21
Body Style coupe coupe
Configuration Flat 4 Inline 6
Displacement 2.5L (152 ci) 3.0L (183 ci) +20.1%
Engine Code MA2.21 B58
Crank cross-plane cross-plane
Aspiration turbocharged turbocharged
Fuel gasoline gasoline
Redline 7,500 rpm 7,000 rpm -6.7%
Power 350 hp @ 6,500 rpm 382 hp @ 5,800 rpm +9.1%
Torque 310 ft·lbs @ 1,900 rpm 369 ft·lbs @ 1,600 rpm +19.0%
Compression 9.5:1 11.0:1 +15.8%
Bore × Stroke 102.0 × 76.4 mm 82.0 × 94.6 mm
Powertrain ICE ICE
Drivetrain RWD RWD
Transmission manual 6-speed automatic / manual 6-speed
Curb Weight 3,053 lbs 3,400 lbs +11.3%
Power-to-Weight 253 hp/ton 248 hp/ton -2.0%
0–100 km/h 4.6s 3.9s -15.2%
Top Speed 177 mph 155 mph -12.3%
MSRP $75,400 $52,500 -30.4%
Fuel Economy 19 / 24 / 21 mpg 25 / 31 / 27 mpg +28.6%