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TL;DR

Mustang (S550) Shelby GT350Smart Money, Pragmatists
Biggest reasons are MSRP (+22%), Compression (+21%), and Body Style (coupe).
Mustang (S550) Shelby GT500Tourers
Biggest reasons are Torque (+46%), Power (+44%), and Power-to-Weight (+27%).
Spec Ford Mustang (S550) Shelby GT350 Ford Mustang (S550) Shelby GT500 Difference
Model Years 2016–2020 2015–2023
Release Date 2015-08-31 2014-09-08
Body Style coupe coupe / convertible
Configuration V8 V8
Displacement 5.2L (315 ci) 5.2L (315 ci)
Engine Code Voodoo Predator
Crank flat-plane cross-plane
Aspiration naturally aspirated supercharged
Fuel gasoline gasoline
Redline 8,250 rpm 7,500 rpm -9.1%
Power 526 hp @ 7,500 rpm 760 hp @ 7,300 rpm +44.5%
Torque 429 ft·lbs @ 4,750 rpm 625 ft·lbs @ 4,000 rpm +45.5%
Compression 12.0:1 9.5:1 -20.8%
Bore × Stroke 94.0 × 93.0 mm 93.0 × 95.0 mm
Powertrain ICE ICE
Drivetrain RWD RWD
Transmission manual 6-speed dual clutch 7-speed
Curb Weight 3,761 lbs 4,273 lbs +13.6%
Power-to-Weight 308 hp/ton 392 hp/ton +27.2%
0–100 km/h 4.3s 3.3s -23.3%
Top Speed 180 mph 180 mph
MSRP $60,440 $73,995 +22.4%
Fuel Economy 21 / 32 / 25 mpg 22 / 32 / 25 mpg +4.8%